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University of Illinois – Urbana-Champaign
1.
Saenz, Juan A.
Detonation shock and ignition dynamics in condensed phase explosives.
Degree: PhD, 0242, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/18562
► We investigate the ignition and dynamics of detonation waves in condensed phase explosives using direct numerical simulations and asymptotic analysis. We develop a model to…
(more)
▼ We investigate the ignition and dynamics of
detonation waves in condensed phase explosives using direct numerical simulations and asymptotic analysis.
We develop a model to simulate deflagration to
detonation transition in pentaerythritol tetranitrate powders. The model uses a continuum mechanics formulation of conservation laws for a mixture of solid reactants and gas products, written in terms of mixture quantities, plus two independent variables used to account for exothermic conversion of solid reactants into gas products, and compaction associated with pore collapse and grain rearrangement. We propose a simple empirical dependence of the reaction rate on the initial bed compaction that allows us to calibrate the model for a wide range of initial conditions. For the solid reactants we use a wide ranging equation of state. We suggest phenomenological closure relations, consistent with the limit of a compressible inert material and of a solid fully reactive material, such that the equation of state can be posed only in terms of mixture quantities and the reaction and compaction variables. We demonstrate the model's ability to capture deflagration to
detonation transition in pentaerythritol tetranitrate powders by matching transients typically observed in experiments, through simulation.
We develop an asymptotic formulation to calculate an intrinsic relation between the shock acceleration, velocity and curvature of self-sustained
detonation waves in the limit of small time variation and small curvature of the lead shock front in condensed phase explosives. The formulation is developed in terms of a general, incomplete equation of state with composition variables to represent scalar quantities for a general range of phenomena. The results presented here are the first calculations obtained from asymptotic
detonation shock dynamics relations for general material models. The formulation is a generalization of an asymptotic theory for a polytropic equation of state and a single step Arrhenius reaction rate model. We discuss the assumptions and justify the generalizations made that allow the use of general form incomplete equations of state. We test the proposed theory by calculating quasi-steady relations between
detonation velocity and curvature and the dynamics of ignition events in a reactive hydrogen-oxygen mixture using an ideal equation of state and single step Arrhenius reaction rate model, and compare the results with those obtained using the original asymptotic theory. We find that quasi-steady relations between
detonation velocity and curvature calculated using the proposed theory are in better agreement with numerical calculations than the original theory. We also use an equation of state that realistically represents condensed phase explosives, and two composition variables to track reaction and compaction processes, to perform calculations of quasi-steady relations between
detonation velocity and curvature,
detonation shock acceleration fields as a function of
detonation velocity and curvature, and the…
Advisors/Committee Members: Stewart, Donald S. (advisor), Stewart, Donald S. (Committee Chair), Austin, Joanna M. (committee member), Glumac, Nick G. (committee member), Matalon, Moshe (committee member).
Subjects/Keywords: Detonation; Detonation Shock Dynamics (DSD); Modeling
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APA (6th Edition):
Saenz, J. A. (2011). Detonation shock and ignition dynamics in condensed phase explosives. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18562
Chicago Manual of Style (16th Edition):
Saenz, Juan A. “Detonation shock and ignition dynamics in condensed phase explosives.” 2011. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 05, 2021.
http://hdl.handle.net/2142/18562.
MLA Handbook (7th Edition):
Saenz, Juan A. “Detonation shock and ignition dynamics in condensed phase explosives.” 2011. Web. 05 Mar 2021.
Vancouver:
Saenz JA. Detonation shock and ignition dynamics in condensed phase explosives. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2142/18562.
Council of Science Editors:
Saenz JA. Detonation shock and ignition dynamics in condensed phase explosives. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18562

University of Ottawa
2.
Lau-Chapdelaine, Sébastien She-Ming.
Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
.
Degree: 2019, University of Ottawa
URL: http://hdl.handle.net/10393/39530
► Two aspects of detonation dynamics are addressed in this thesis by articles. The first part of the thesis investigates shock reflection phenomena believed to be…
(more)
▼ Two aspects of detonation dynamics are addressed in this thesis by articles. The first part of the thesis investigates shock reflection phenomena believed to be responsible for enhancing reaction rates in detonations, namely Kelvin-Helmholtz instability and Mach stem bifurcation caused by forward jetting. Three papers are presented.
The first numerically investigates shock reflections from a wedge under detonation-like conditions. A state of the art solver of the Euler equations is used. The shock reflection configuration is shown to depend on solver type, wedge implementation, and resolution. The type of reflection (i.e. regular or irregular) is found to depend on corner geometry, even far from the corner, showing initial conditions can play important roles in shock reflections.
These complications are addressed with shock-resolved viscous simulations and a new initial condition: the triple point reflection. The numerical method is demonstrated in the second paper, and the presence of Kelvin-Helmholtz instability is investigated. Viscosity is found to play an important role in delaying the instability, which is found not to be a likely source of reaction acceleration on time scales commensurate with autoignition behind the Mach stem, but may become important on scales associated with the detonation cell.
Mach stem bifurcations are investigated experimentally and numerically in the third paper. Experimental shock reflections are performed from a free-slip boundary in gases with differing isentropic exponents. Bifurcations are found in experiments, viscous and inviscid simulations. Viscosity is found to delay bifurcations. Inviscid simulations are used to approximate the limits of Mach stem bifurcation in the phase space of Mach number, isentropic exponent, and reflection angle. A maximum isentropic exponent is found beyond which bifurcations do not occur, matching the irregular/regular boundary of the detonation cellular structure. Flow field instability is found in experiments at high Mach number and low isentropic exponent.
The second part of the thesis, comprised of one paper, investigates the dynamics of detonations with multiple thermicity peaks using Fickett's detonation analogue. Steady state analysis predicts multiple possible steady states, but only the fastest is singularity-free. Simulations show other solutions develop shock waves that eventually establish a detonation travelling at the fastest velocity allowed by the generalized Chapman-Jouguet criterion. Characteristic and linear stability analysis shows these shocks are found to arise due to instability at the sonic points.
Subjects/Keywords: Detonation;
Shock Waves
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
Lau-Chapdelaine, S. S. (2019). Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/39530
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lau-Chapdelaine, Sébastien She-Ming. “Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
.” 2019. Thesis, University of Ottawa. Accessed March 05, 2021.
http://hdl.handle.net/10393/39530.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lau-Chapdelaine, Sébastien She-Ming. “Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
.” 2019. Web. 05 Mar 2021.
Vancouver:
Lau-Chapdelaine SS. Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
. [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10393/39530.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lau-Chapdelaine SS. Viscous Triple Shock Reflections Relevant to Detonation Waves, and Detonation Dynamics Predicted by the Fickett Model
. [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/39530
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Notre Dame
3.
Christopher Michael Romick.
On the Effect of Diffusion on Gaseous
Detonation</h1>.
Degree: Aerospace and Mechanical Engineering, 2015, University of Notre Dame
URL: https://curate.nd.edu/show/z603qv36b4f
► The development and propagation of detonations is examined in the presence of diffusive processes. The difference between the inviscid and viscous models is quantitatively…
(more)
▼ The development and propagation of
detonations is examined in the presence of diffusive processes. The
difference between the inviscid and viscous models is
quantitatively evaluated for one-dimensional propagating
detonations. First, an investigation of viscous effects is
performed on one-dimensional pulsating unsupported Chapman-Jouguet
detonations using a simplified one step kinetics model for various
activation energies. The inclusion of viscosity in the model,
delays instability to a higher activation energy and enlarges the
activation energy range of the bifurcation process that leads to
chaotic
detonation. Then using detailed kinetics and full
multi-component diffusion, a set of one-dimensional piston-driven
hydrogen-air detonations is evaluated. The diffusive processes
alter the behavior near the stability point, but as the intrinsic
instability grows in strength, the viscous effects diminish.
Harmonic analysis is used to illustrate how the frequency spectra
of the pulsations evolve. Lastly, a study of the acceleration of
several symmetric laminar flames in narrow two-dimensional channels
is performed. Adiabatic no-slip walls contribute to the
acceleration of the flame towards
detonation by trapping the
thermal energy that the boundary layer has converted from the
mechanical energy of the propagating acoustic waves emanating from
the flame. Below a threshold in channel width, viscous resistance
becomes dominant and can significantly extend the time to the
exponential pressure growth and acceleration of the flame.
Increasing the percentage of diluent in the flame reduces the rate
at which the flame accelerates and alters the width at which
viscous resistance dominates. Ambient temperature isothermal walls
retard the propagation of the flame in comparison to adiabatic
walls at early times with the risk of
extinction.
Advisors/Committee Members: Gretar Tryggvason, Committee Member, Tariq D. Aslam, Committee Member, Joseph M. Powers, Committee Chair, Karel Matous, Committee Member.
Subjects/Keywords: diffusion; gaseous detonation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Romick, C. M. (2015). On the Effect of Diffusion on Gaseous
Detonation</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/z603qv36b4f
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Romick, Christopher Michael. “On the Effect of Diffusion on Gaseous
Detonation</h1>.” 2015. Thesis, University of Notre Dame. Accessed March 05, 2021.
https://curate.nd.edu/show/z603qv36b4f.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Romick, Christopher Michael. “On the Effect of Diffusion on Gaseous
Detonation</h1>.” 2015. Web. 05 Mar 2021.
Vancouver:
Romick CM. On the Effect of Diffusion on Gaseous
Detonation</h1>. [Internet] [Thesis]. University of Notre Dame; 2015. [cited 2021 Mar 05].
Available from: https://curate.nd.edu/show/z603qv36b4f.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Romick CM. On the Effect of Diffusion on Gaseous
Detonation</h1>. [Thesis]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/z603qv36b4f
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cincinnati
4.
Driscoll, Robert B.
Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System.
Degree: PhD, Engineering and Applied Science: Aerospace
Engineering, 2016, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155478
► An experimental study is conducted on a Pulse Detonation Engine-Crossover System to investigate the feasibility of repeated, shock-initiated combustion and characterize the initiation performance. A…
(more)
▼ An experimental study is conducted on a Pulse
Detonation Engine-Crossover System to investigate the feasibility
of repeated, shock-initiated combustion and characterize the
initiation performance. A PDE-crossover system can decrease
deflagration-to-
detonation transition length while employing a
single spark source to initiate a multi-PDE system. Visualization
of a transferred shock wave propagating through a clear channel
reveals a complex shock train behind the leading shock. Shock wave
Mach number and decay rate remains constant for varying crossover
tube geometries and operational frequencies. A temperature gradient
forms within the crossover tube due to forward flow of high
temperature ionized gas into the crossover tube from the driver PDE
and backward flow of ionized gas into the crossover tube from the
driven PDE, which can cause intermittent auto-ignition of the
driver PDE. Initiation performance in the driven PDE is strongly
dependent on initial driven PDE skin temperature in the shock wave
reflection region. An array of
detonation tubes connected with
crossover tubes is developed using optimized parameters and
successful operation utilizing shock-initiated combustion through
shock wave reflection is achieved and sustained. Finally, an
air-breathing, PDE-Crossover System is developed to characterize
the feasibility of shock-initiated combustion within an
air-breathing pulse
detonation engine. The initiation effectiveness
of shock-initiated combustion is compared to spark discharge and
detonation injection through a pre-detonator. In all cases,
shock-initiated combustion produces improved initiation performance
over spark discharge and comparable
detonation transition run-up
lengths relative to pre-detonator initiation. A computational study
characterizes the mixing processes and injection flow field within
a rotating
detonation engine. Injection parameters including
reactant flow rate, reactant injection area, placement of the fuel
injection, and fuel injection distribution are varied to assess the
impact on mixing. Decreasing reactant injection areas improves fuel
penetration into the cross-flowing air stream, enhances turbulent
diffusion of the fuel within the annulus, and increases local
equivalence ratio and fluid mixedness. Staggering fuel injection
holes produces a decrease in mixing when compared to collinear fuel
injection. Finally, emulating nozzle integration by increasing
annulus back-pressure increases local equivalence ratio in the
injection region due to increased convection residence
time.
Advisors/Committee Members: Gutmark, Ephraim (Committee Chair).
Subjects/Keywords: Aerospace Materials; Detonation; Pulse Detonation Engine; Rotating Detonation Engine; PDE-Crossover System; Reactant Injection Mixing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Driscoll, R. B. (2016). Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155478
Chicago Manual of Style (16th Edition):
Driscoll, Robert B. “Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System.” 2016. Doctoral Dissertation, University of Cincinnati. Accessed March 05, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155478.
MLA Handbook (7th Edition):
Driscoll, Robert B. “Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System.” 2016. Web. 05 Mar 2021.
Vancouver:
Driscoll RB. Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System. [Internet] [Doctoral dissertation]. University of Cincinnati; 2016. [cited 2021 Mar 05].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155478.
Council of Science Editors:
Driscoll RB. Investigation of Sustained Detonation Devices: the Pulse
Detonation Engine-Crossover System and the Rotating Detonation
Engine System. [Doctoral Dissertation]. University of Cincinnati; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155478
5.
Jarsale, Geoffrey.
Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray.
Degree: Docteur es, Energétique, thermique, combustion, 2017, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique
URL: http://www.theses.fr/2017ESMA0021
► Ce projet de thèse expérimentale vise à étudier l'interaction d'une détonation se propageant dans une atmosphère gazeuse réactive ensemencée d'un spray d'eau, au sein d'un…
(more)
▼ Ce projet de thèse expérimentale vise à étudier l'interaction d'une détonation se propageant dans une atmosphère gazeuse réactive ensemencée d'un spray d'eau, au sein d'un tube vertical de 4 m de haut ayant une section carré de 52 mm de côté. Le dispositif permet de mesurer les célérités de propagation de la détonation et les niveaux de pression associée, ainsi que d'analyser la structure cellulaire. La caractérisation du spray d'eau par la méthode PDI a permis d'évaluer le diamètre moyen des gouttelettes à 10 μm. Les densités apparentes de spray peuvent atteindre 200 à 250 g/m³.La première étude a consisté à faire varier la dilution Z en argon de 3 à 28, ainsi que la quantité X d'eau injectée (YH2O pouvant atteindre 15%), dans des mélanges de types C2H4-O2-Zar-XH2O(l). Cette étude a permis de faire varier les longueurs caractéristiques de la détonation par rapport à celles du spray. Deux comportements très différents ont été mis en évidence, suivant la taille plus petite (premier comportement) ou plus grande (deuxième comportement) de la longueur d’induction chimique par rapport à celle de l’atomisation secondaire des gouttelettes, dans les conditions de détonation. Ainsi dans le cas idéal où l’épaisseur hydrodynamique – distance moyenne entre le choc et la surface sonique – englobe l’ensemble des interactions diphasiques, la célérité de détonation sera celle de Chapman-Jouguet diphasique, inférieure au cas purement gazeux. De plus dans le cas du premier comportement, la vapeur issue de la phase dispersée ne participera pas l'agrandissement de la structure cellulaire, a contrario du second.Afin de préciser le mécanisme responsable du deuxième comportement, la seconde étude s'est quant à elle attachée à l'analyse de l'influence du spray par rapport à la régularité de la structure cellulaire de la détonation. Deux mélanges sont ainsi considérés, générant une détonation à structure régulière (C2H4-O2-28Ar-XH2O(l)) ou irrégulière (C2H4-O2-11.286N2-XH2O(l)). Cette étude a confirmé que dans cette configuration, la vapeur d’eau issue de la phase dispersée liquide participe alors à l'agrandissement de la structure cellulaire. Elle a également permis de montrer la plus grande résilience des détonations irrégulières par rapport aux détonations régulières vis-à-vis des pertes pariétales. Il a également été constaté que la perte de régularité de la structure cellulaire liée à l'ajout d'eau est associée à l'augmentation de l'énergie d'activation réduite Ea/RTvn et du facteur de stabilité, expliquant par ailleurs l'apparition d'une sous-structure cellulaire, semblable à celle observée dans les détonations initialement irrégulières. La vapeur d’eau ainsi produite par l’évaporation du spray agit alors comme un diluant inerte en aval du choc incident.
The interaction between a gaseous detonation and a water spray was experimentally studied in a 4 m high vertical detonation tube with a 52 mm by 52 mm square section. Detonation pressure signals, average velocity and cellular patterns were recorded.The spray, produced by an…
Advisors/Committee Members: Chinnayya, Ashwin (thesis director), Virot, Florent (thesis director).
Subjects/Keywords: Détonation gazeuse; Gaseous detonation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jarsale, G. (2017). Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray. (Doctoral Dissertation). Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Retrieved from http://www.theses.fr/2017ESMA0021
Chicago Manual of Style (16th Edition):
Jarsale, Geoffrey. “Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray.” 2017. Doctoral Dissertation, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Accessed March 05, 2021.
http://www.theses.fr/2017ESMA0021.
MLA Handbook (7th Edition):
Jarsale, Geoffrey. “Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray.” 2017. Web. 05 Mar 2021.
Vancouver:
Jarsale G. Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray. [Internet] [Doctoral dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2017. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2017ESMA0021.
Council of Science Editors:
Jarsale G. Etude expérimentale de l'interaction d'une détonation gazeuse avec un spray d'eau : Experimental Study of the Interaction Between a Gaseous Detonation with a Water Spray. [Doctoral Dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2017. Available from: http://www.theses.fr/2017ESMA0021

Texas A&M University
6.
Horowitz, Steven Michael.
Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics.
Degree: MS, Nuclear Engineering, 2015, Texas A&M University
URL: http://hdl.handle.net/1969.1/155511
► This thesis investigates the ability of a high-purity germanium detector to perform post-detonation forensics on the debris from several types of nuclear weapons 24 hours…
(more)
▼ This thesis investigates the ability of a high-purity germanium detector to perform post-
detonation forensics on the debris from several types of nuclear weapons 24 hours after
detonation. The ultimate result of this analysis would be the deployment of this detector on an autonomous robot for sample collection and remote analysis. Monte Carlo N-Particle Transport Code Version 6 (MCNP6) was utilized to simulate the
detonation of five nuclear weapon loadings to a yield of 10 kilotons of TNT. Simulations included uranium weapons of 20%, 50%, and 90% enrichment, as well as reactor-grade and weapons-grade plutonium weapons. The resulting isotopics were assumed to be distributed evenly as fallout, and this fallout composition was utilized to generate a source term through the use of photon yield databases. A high-purity germanium detector was modeled in MCNP6. Using this model and the source term, the predicted response spectrum for each fallout composition was generated and compared using Genie spectroscopy software in an attempt to find differentiating features between them.
The ability to distinguish between fallout originating from a uranium or plutonium weapon was identified. If the ratio of photopeak count rates at 320 keV and 251 keV is near to or less than 0.05, the initial weapon loading was likely uranium. Once identified to be uranium, the count rate ratio of the 108 keV to the 251 keV photopeak can be utilized to determine a range for the initial uranium enrichment. The relative height of the 108 keV peak due to 239Np changes drastically based on initial enrichment due to differences in the production of 239Np from neutron capture in 238U and subsequent beta decay.
If the ratio of photopeak count rates at 320 keV and 251 keV is greater than 0.06, the initial weapon was likely plutonium. A methodology to distinguish between weapons-grade and reactor-grade plutonium was not identified. This is due to the similar fission yields of the plutonium isotopes, while yields of uranium and plutonium isotopes are sufficiently-different to allow for variations in the fallout spectra.
Advisors/Committee Members: Charlton, William (advisor), Marianno, Craig (committee member), Khatri, Sunil (committee member).
Subjects/Keywords: MCNP6; forensics; spectroscopy; photon; detonation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Horowitz, S. M. (2015). Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155511
Chicago Manual of Style (16th Edition):
Horowitz, Steven Michael. “Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics.” 2015. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/155511.
MLA Handbook (7th Edition):
Horowitz, Steven Michael. “Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics.” 2015. Web. 05 Mar 2021.
Vancouver:
Horowitz SM. Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/155511.
Council of Science Editors:
Horowitz SM. Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155511

Queens University
7.
Rainsford, Georgina.
Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
.
Degree: Mechanical and Materials Engineering, Queens University
URL: http://hdl.handle.net/1974/22665
► This study used self-luminous high-speed photography to visualize quasi-detonation propagation and deflagration-to-detonation transition (DDT) in a transparent round tube equipped with repeating orifice plates. Experiments…
(more)
▼ This study used self-luminous high-speed photography to visualize quasi-detonation propagation and deflagration-to-detonation transition (DDT) in a transparent round tube equipped with repeating orifice plates. Experiments were conducted in a combustion channel consisting of a 3.16 m square channel with a 7.6 cm by 7.6 cm cross-section connected to a 1.55 m cylindrical channel filled with orifice plates. Rectangular ‘fence-type’ obstacles were installed on the top and bottom of the square channel with a 3.8 cm opening between them. Two sets of orifice plates with different diameters, d, representing different blockage ratios (BR) were tested (d=5.33 cm for 50% BR and 3.81 cm for 75% BR orifice plates).
Stoichiometric hydrogen-oxygen mixtures at initial pressures of 4–60 kPa were ignited at one end of the combustion channel. Average propagation velocities were derived from shock-time-of-arrival measurements using pressure transducers in the square channel and high-speed video filmed through the round tube.
As established in literature, a substantially higher orifice-diameter-to-detonation-cell-size ratio (d/λ) was observed for the 75% BR tests (d/λ=14) than the 50% BR tests (d/λ=1.4) and Peraldi’s d/λ≥1 criterion for the DDT limit. Video footage revealed that this difference may be attributed to a difference in near-limit detonation initiation modes: at 75% BR, detonation initiation occurred on the orifice face after shock reflection, whereas at 50% BR, detonation initiation occurred on the tube wall between orifice plates.
Synchronized high-speed video and soot foils allowed for the classification of quasi-detonation propagation modes. At 50% BR, as initial pressure increased, fast-flame propagation transitioned to single-hot-spot wall ignition detonation to multi-hot-spot wall ignition detonation, and finally to continuous detonation propagation. A similar progression was observed at 75% BR, except that obstacle face ignition detonations occurred between the fast-flame and single-hot-spot regimes, and continuous detonations were not observed as tube strength concerns limited the maximum initial test pressure.
For a continuous detonation, a higher average velocity was observed in the round tube than the square channel, which can be attributed to the effect of wave curvature during detonation diffraction past an obstacle (2D diffraction in the square channel compared to 3D diffraction in the round tube).
Subjects/Keywords: detonation propagation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Rainsford, G. (n.d.). Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/22665
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rainsford, Georgina. “Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
.” Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/22665.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rainsford, Georgina. “Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
.” Web. 05 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Rainsford G. Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
. [Internet] [Thesis]. Queens University; [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/22665.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Rainsford G. Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates
. [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/22665
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Queens University
8.
Cross, Mitchell.
Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
.
Degree: Mechanical and Materials Engineering, 2015, Queens University
URL: http://hdl.handle.net/1974/13616
► Accidental explosions in the chemical, oil & gas industry are a serious problem. The ultimate objective of this thesis is to establish a new parameter/process…
(more)
▼ Accidental explosions in the chemical, oil & gas industry are a serious problem. The ultimate objective of this thesis is to establish a new parameter/process that can be used to categorize the relative detonation explosion hazard of a fuel that can be measured in a smaller, more practical apparatus. Experiments were carried out in an apparatus consisting of a 6.1 m long (composed of 2 equal length sections), 100 mm inner-diameter tube. A detonation was initiated in the first half of the tube using an acetylene-oxygen driver ignited by a weak spark. The second half of the tube contained orifice plates equally spaced at the tube diameter. Six different orifice plate diameters between 38.1 mm (1.5˝) and 76.2 mm (3˝), in increments of 6.4 mm (1/4˝) were used in the study. The average combustion front velocity was obtained from time-of-arrival measurements deduced from ionization probe signals. The critical (minimum) orifice plate diameter required for successful transmission of a detonation from a smooth tube was measured for different stoichiometric fuel-air mixtures. The ratio of the critical orifice plate diameter (d) and the mixture detonation cell size (λ) varies strongly with the orifice plate blockage ratio (BR), with a value approaching unity (d/λ→1) with decreasing blockage ratio. It is proposed that the critical orifice plate diameter could be used to categorize the detonation hazard potential of single or multi-component fuels. Additional experiments were performed in same apparatus to measure the Deflagration to Detonation Transition (DDT) and detonation propagation limits (distinguished by the method of initiation). Both the propagation and the DDT limits narrow with increasing BR, more significantly for the DDT limits. The narrowing of the limits with increasing BR also corresponds to a larger deviation from the d/λ=1 detonation limit criterion. These results indicate that the beneficial effects of the orifice plate in providing a reflection surface diminishes with increased BR due to the increased effect of shock wave weakening by the diffraction process. Novel use of soot foils showed that the structure of the detonation wave is very non-uniform and highly unsteady, characterized by local detonation initiation and failure.
Subjects/Keywords: DDT
;
Detonation Propagation
;
Combustion
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cross, M. (2015). Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13616
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cross, Mitchell. “Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
.” 2015. Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/13616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cross, Mitchell. “Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
.” 2015. Web. 05 Mar 2021.
Vancouver:
Cross M. Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/13616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cross M. Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13616
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Sydney
9.
Piper, Stephen J. A.
Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
.
Degree: 2016, University of Sydney
URL: http://hdl.handle.net/2123/16103
► Using detonation rather than deflagration for a combustion mode in an engine could provide an increase in thermal efficiency of up to 50%. Furthermore utilising…
(more)
▼ Using detonation rather than deflagration for a combustion mode in an engine could provide an increase in thermal efficiency of up to 50%. Furthermore utilising detonations will allow a broad speed envelope, from zero to Mach five. Unfortunately engines based on detonation have been plagued with inherent issues, be it difficulties in re-initiation or inefficient inlet valves. It is for these main reasons that there is yet to be a viable solution. To solve these issues with the current technology a Pulse Detonation Engine of novel design has been presented, and analysed for feasibility. The design seeks to eradicate the main issues of high pressure inlets and troublesome initiation experienced in current detonation engine designs, namely Rotating Det- onation Engines (RDEs) and Pulse Detonation Engine (PDEs). The engine functions through an oscillatory cycle where shock waves from the existing detonation wave are used to propagate to a new detonation tube, via the ‘branch tube.’ The shock wave starts a new det- onation along with a new initiating shock, that propagates back through the branch tube, to the previous tube, hence continuing the cycle. This design allows the fill and purge benefits of a conventional PDE along with the continuous cycle nature of the RDE. The system has been analysed using a quasi-analytical method. The quasi-analytical method is used over other options such as Computational Fluid Dynamics (CFD) due to the short optimisation/design time. It also allows the engines cycle to be broken down, piece by piece, giving a more tactile feel to the analysis. This gives insight into the engine’s timing, cycle and performance. The research also al- lows a good understanding of the basic flow structure and detonation re-initiation process, critical to the engines functionality. Along with the model and analysis, preliminary optimum engine designs are presented for different detonation tube sizes. The results show that a detonation engine, using oscillatory shock initiation, is physically possible. Analysis shows that an optimised 0.5m long detonation tube requires a branch tube length of 2.28 m. This geometry yields a minimum branch tube Mach number of 1.28 and an exit Mach number of 1.99, which when combined with a simple parabolic reflector, is of sufficient strength for initiation. The timing offset between the two tubes is optimised at half the PDE cycle time with a value of 0.0025 s and a maximum frequency of 400 Hz. An un-ideal case where the timing offset is less than the minimum of 0.0025 s, for a detonation tube length of 0.5m, results in a cycle failure. This is due to the initiating shock wave arriving before the detonation tube has been purged and filled. Longer branch tube lengths allow a lower frequency, however this in undesirable due to the lower cycle averaged thrust. The results predict that the oscillatory nature of the initiating method will enable a truly feasible detona- tion based engine. The results generated allow further development of the engine, both experimentally,…
Subjects/Keywords: Oscillatory;
Shock;
Initiated;
Detonation;
Engine
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Piper, S. J. A. (2016). Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/16103
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Piper, Stephen J A. “Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
.” 2016. Thesis, University of Sydney. Accessed March 05, 2021.
http://hdl.handle.net/2123/16103.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Piper, Stephen J A. “Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
.” 2016. Web. 05 Mar 2021.
Vancouver:
Piper SJA. Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
. [Internet] [Thesis]. University of Sydney; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2123/16103.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Piper SJA. Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis
. [Thesis]. University of Sydney; 2016. Available from: http://hdl.handle.net/2123/16103
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah
10.
Beckvermit, Jacqueline.
Computational modeling of the explosion and detonation of high explosives.
Degree: PhD, Chemistry, 2016, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4075/rec/528
► The detonation of hundreds of explosive devices from either a transportation or storage accident is an extremely dangerous event. Motivation for this work came from…
(more)
▼ The detonation of hundreds of explosive devices from either a transportation or storage accident is an extremely dangerous event. Motivation for this work came from a transportation accident where a truck carrying 16,000 kg of seismic boosters overturned, caught fire and detonated. The damage was catastrophic, creating a crater 24 m wide by 10 m deep in the middle of the highway. Our particular interest is understanding the fundamental physical mechanisms by which convective deflagration of cylindrical PBX-9501 devices can transition to a fully-developed detonation in transportation and storage accidents. Predictive computer simulations of large-scale deflagrations and detonations are dependent on the availability of robust reaction models embedded in a computational framework capable of running on massively parallel computer architectures. Our research group has been developing such models in the Uintah Computational Framework, which is capable of scaling up to 512 K cores. The current Deflagration to Detonation Transition (DDT) model merges a combustion model from Ward, Son, and Brewster that captures the effects of pressure and initial temperature on the burn rate, with a criteria model for burning in cracks of damaged explosives from Berghout et al., and a detonation model from Souers describing fully developed detonation. The prior extensive validation against experimental tests was extended to a wide range of temporal and spatial scales. We made changes to the reactant equation of state-enabling predictions of combustions, explosions, and detonations over a range of pressures spanning five orders of magnitude. A resolution dependence was eliminated from the reaction model facilitating large scale simulations to be run at a resolution of 2 mm without loss of fidelity. Adjustments were also made to slow down the flame propagation of conductive and convective deflagration. Large two- and three-dimensional simulations revealed two dominant mechanisms for the initiation of a DDT, inertial confinement and Impact to Detonation Transition. Understanding these mechanisms led to identifying ways to package and store explosive devices that reduced the probability of a detonation. We determined that the arrangement of the explosive cylinders and the number of devices packed in a box greatly affected the propensity to transition to a detonation.
Subjects/Keywords: DDT; Deflagration; Detonation; Impact to Detonation; Inertial Confinement
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beckvermit, J. (2016). Computational modeling of the explosion and detonation of high explosives. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4075/rec/528
Chicago Manual of Style (16th Edition):
Beckvermit, Jacqueline. “Computational modeling of the explosion and detonation of high explosives.” 2016. Doctoral Dissertation, University of Utah. Accessed March 05, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4075/rec/528.
MLA Handbook (7th Edition):
Beckvermit, Jacqueline. “Computational modeling of the explosion and detonation of high explosives.” 2016. Web. 05 Mar 2021.
Vancouver:
Beckvermit J. Computational modeling of the explosion and detonation of high explosives. [Internet] [Doctoral dissertation]. University of Utah; 2016. [cited 2021 Mar 05].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4075/rec/528.
Council of Science Editors:
Beckvermit J. Computational modeling of the explosion and detonation of high explosives. [Doctoral Dissertation]. University of Utah; 2016. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/4075/rec/528

Queens University
11.
Metrow, Curtis.
Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
.
Degree: Mechanical and Materials Engineering, Queens University
URL: http://hdl.handle.net/1974/26683
► There has been increasing worldwide interest in research and development of Rotating Detonation Engines (RDEs) as a propulsion system. A study was conducted to examine…
(more)
▼ There has been increasing worldwide interest in research and development of Rotating Detonation Engines (RDEs) as a propulsion system. A study was conducted to examine detonation behavior in a linearized representation of an RDE. The two-dimensional nature of the phenomenon in such a geometry permits the use of classical detonation visualization techniques. A predetonator was used to generate a steady detonation wave upstream of the test section. The test section was separated from the predetonator by a sealing door such that it could be filled with inert gas replicating the nonreactive properties of the combustion products in an actual RDE. The top wall of the test section contained a linear array of small holes through which premixed stoichiometric hydrogen-oxygen flowed into the inert gas filled test section to form a stratified layer just prior to the arrival of the detonation wave. The test section was equipped with windows to permit high-speed schlieren photography. The soot foil technique was used to capture the detonation cellular structure in the resulting stratified layer. The layer height was varied by changing the time that elapsed from when the hydrogen-oxygen injection started to when the detonation wave arrived at the test section. The minimum layer height required for detonation propagation accommodated 10-11 detonation cells. This is significantly larger than the three detonation cell requirement reported in previous studies carried out with sharp interface homogeneous-mixture stratified layers.
An alternate rendition of the test was conducted whereby a finite axial-length stratified layer formed by a buoyancy driven predetonator gravity current. In these tests, the stratified layer occupied roughly half the test section height and the equivalence ratio was used to vary the predetonator detonation cell size. The fuel-rich propagation limit corresponded to an equivalence ratio of 2.5, for which roughly three cells were accommodated by the stratified layer. Tests carried out with nitrogen and carbon dioxide in the test section showed a strong effect of the inert gas, indicating that substantial mixing occurred at the leading edge of the gravity current.
Subjects/Keywords: Detonation Combustion
;
Rotating Detonation Engine
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Metrow, C. (n.d.). Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/26683
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Metrow, Curtis. “Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
.” Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/26683.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Metrow, Curtis. “Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
.” Web. 05 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Metrow C. Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
. [Internet] [Thesis]. Queens University; [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/26683.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Metrow C. Detonation Propagation in a Liniarized Representation of a Rotating Detonation Engine
. [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/26683
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Georgia Tech
12.
Miller, Christopher M.
Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading.
Degree: PhD, Mechanical Engineering, 2019, Georgia Tech
URL: http://hdl.handle.net/1853/62297
► The ignition sensitivity of heterogeneous energetic materials subject to shock loading is analyzed using both a Lagrangian and Eulerian computational framework. The specific focus here…
(more)
▼ The ignition sensitivity of heterogeneous energetic materials
subject to shock loading is analyzed using both a Lagrangian and Eulerian computational framework. The specific focus here is on the various microstructure heterogeneities (including cracks, granular anisotropy, voids, and aluminum additives) and their relative contributions to the development of critical hotspots and macroscale
detonation behavior characteristics, such as the run distance to
detonation. A probabilistic approach is developed by generating statistically equivalent microstructure sample sets (SEMSS) and measuring the ignition behavior of each one under similar impact conditions. By varying the material and microstructural characteristics in a controlled fashion, the contribution to ignition of each specific type of microstructural defects is rank-ordered. The Lagrangian-based cohesive finite element method (CFEM) is used to track material response prior to the onset of chemical reaction. A probability threshold is proposed based on a modified form of the Hugh James and Walker-Wasley energy-based ignition criterions. The computations focus on both 100% packed energetic grains (HMX) as well as aluminized polymer-bonded explosives (APBXs). The exact physical mechanisms governing the development of hotspots are quantified, and the friction is found to be the dominant dissipation mechanism. The Sandia National Laboratories Eulerian hydrocode, CTH, is then used to simulate the entire shock to
detonation transition (SDT) of pressed HMX. The run-to-
detonation distance is predicted as a function of shock pressure. The initial probability analysis is expanded upon to generate a predictive map of the SDT threshold for both 2D and 3D samples. The probability thresholds proposed in this study serve as a useful design metric and may directly influence future shock experimentation as well as the development of new insensitive high explosives design metric and may directly influence future shock experimentation as well as the development of new insensitive high explosives.
Advisors/Committee Members: Zhou, Min (advisor), Neu, Richard (committee member), Zhu, Ting (committee member), Rimoli, Julian (committee member), Yarrington, Cole (committee member).
Subjects/Keywords: Ignition sensitivity; Detonation; HMX; PBX; Microstructure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Miller, C. M. (2019). Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/62297
Chicago Manual of Style (16th Edition):
Miller, Christopher M. “Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading.” 2019. Doctoral Dissertation, Georgia Tech. Accessed March 05, 2021.
http://hdl.handle.net/1853/62297.
MLA Handbook (7th Edition):
Miller, Christopher M. “Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading.” 2019. Web. 05 Mar 2021.
Vancouver:
Miller CM. Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading. [Internet] [Doctoral dissertation]. Georgia Tech; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1853/62297.
Council of Science Editors:
Miller CM. Effects of microstructure and chemistry on the ignition sensitivity of PBX under shock loading. [Doctoral Dissertation]. Georgia Tech; 2019. Available from: http://hdl.handle.net/1853/62297

Texas A&M University
13.
Gill, Matthew Thomas.
Design of a Large-Scale Detonation Tube.
Degree: MS, Mechanical Engineering, 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/187413
► Multiple vital industries, especially those in the energy sector, are vulnerable to unexpected detonation events. Extremely destructive and difficult to predict, the processes by which…
(more)
▼ Multiple vital industries, especially those in the energy sector, are vulnerable to unexpected
detonation events. Extremely destructive and difficult to predict, the processes by which they are formed and the limits over which they can propagate have been a significant focus of research for years, but it is often difficult to carry out relevant experiments on any significant scale. This work presents the motivations for such study, the basic theory required to understand what is happening within a
detonation, and the designs for a proposed facility which could be used to broaden the scope of current
detonation research. It would allow the
detonation phenomenon to be studied at a scale which is rarely achievable and with a precision which is rarely accomplished. This would help to either validate or disprove trends which have been established with small-scale rigs but not tested at the proposed size.
Most
detonation tubes have diameters no larger than a 30 cm; the proposed facility boasts an internal diameter of 70 cm and a length of 100 m, allowing mixtures which are usually outside of the range of
detonation to be studied in novel ways. Detonations can be induced through deflagration-to-
detonation transition using a small point energy source, or directly initiated via a shock wave or the explosion of a separate, more energetic mixture. Measurement is accomplished with pressure transducers and photodiodes spaced down the length of the tube. End-tube diagnostics include fast-framing Schlieren imaging and Planar Laser-Induced Fluorescence, and use elongated windows to view the tube interior, allowing the reaction zone structure to be studied at large scale. Smaller windows spaced down the length of the tube enable additional data-gathering capabilities where necessary. The implementation of this facility would serve to increase the scope of understanding of
detonation events and contribute to the improvement of safety standards for vulnerable workplaces.
Advisors/Committee Members: Petersen, Eric L (advisor), Jacobs, Timothy J (committee member), Mashuga, Chad V (committee member).
Subjects/Keywords: Detonation; Combustion; DDT; Reaction Zone Structure; PLIF
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gill, M. T. (2016). Design of a Large-Scale Detonation Tube. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/187413
Chicago Manual of Style (16th Edition):
Gill, Matthew Thomas. “Design of a Large-Scale Detonation Tube.” 2016. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/187413.
MLA Handbook (7th Edition):
Gill, Matthew Thomas. “Design of a Large-Scale Detonation Tube.” 2016. Web. 05 Mar 2021.
Vancouver:
Gill MT. Design of a Large-Scale Detonation Tube. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/187413.
Council of Science Editors:
Gill MT. Design of a Large-Scale Detonation Tube. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/187413

Indian Institute of Science
14.
Bhat, Abhishek R.
Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE.
Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/3181
► This thesis is concerned with experimental and computational studies on pulse detonation engine (PDE) that has been envisioned as a new concept engine. These engines…
(more)
▼ This thesis is concerned with experimental and computational studies on pulse
detonation engine (PDE) that has been envisioned as a new concept engine. These engines use the high pressure generated by
detonation wave for propulsion. The cycle efficiency of PDE is either higher in comparison to conventional jet engines or at least has similar high performance with much greater simplicity in terms of components.
The first part of the work consists of an experimental study of the performance of PDE under choked flame and partial fill conditions. Detonations used in classical PDEs create conditions of Mach numbers of 4-6 and choked flames create conditions in which flame achieves Mach numbers near-half of
detonation wave. While classical concepts on PDE's utilize deflagration-to-
detonation transition and are more intensively studied, the working of PDE under choked regime has received inadequate attention in the literature and much remains to be explored. Most of the earlier studies claim transition to
detonation as success in the working of the PDE and non-transition as failure. After exploring both these regimes, the current work brings out that impulse obtained from the wave traveling near the choked flame velocity conditions is comparable to
detonation regime. This is consistent with the understanding from the literature that CJ
detonation may not be the optimum condition for maximum specific impulse. The present study examines the details of working of PDE close to the choked regime for different experimental conditions, in comparison with other aspects of PDEs.
The study also examines transmission of fast flames from small diameter pipe into larger ducts. This approach in the smaller pipe for flame acceleration also leading to decrease in the time and length of transition process. The second part of the study aims at elucidating the features of deflagration-to-
detonation transition with direct numerical simulation (DNS) accounting for and the choice of full chemistry and DNS is based on two features: (a) the induction time estimation at the conditions of varying high pressure and temperature behind the shock can only be obtained through the use of full chemistry, and (b) the complex effects of fine scale of turbulence that have sometimes been argued to influence the acceleration phase in the DDT cannot be captured otherwise. Turbulence in the early stages causes flame wrinkling and helps flame acceleration process. The study of flame propagation showed that the wrinkling of flame has major effect on the final transition phase as flame accelerates through the channel. Further, flame becomes corrugated prior to transition. This feature was investigated using non-uniform initial conditions. Under these conditions the pressure waves emanating from corrugated flame interact with the shock moving ahead and transition occurs in between the flame and the forward propagating shock wave.
The primary contributions of this thesis are: (a) Elucidating the phenomenology of choked flames, demonstrating that under partial…
Advisors/Committee Members: Paul, P J (advisor).
Subjects/Keywords: Combustion; Pluse Detonation Engine (PDE); Deflagration Waves; Detonation Waves; Deflagration to Detonation Transition (DDT); Choked Flames; Weighted Essentially Non Oscillatory Scheme (WENO); Deflagration-to-Detonation Transition; G26367
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APA (6th Edition):
Bhat, A. R. (2018). Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3181
Chicago Manual of Style (16th Edition):
Bhat, Abhishek R. “Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed March 05, 2021.
http://etd.iisc.ac.in/handle/2005/3181.
MLA Handbook (7th Edition):
Bhat, Abhishek R. “Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE.” 2018. Web. 05 Mar 2021.
Vancouver:
Bhat AR. Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Mar 05].
Available from: http://etd.iisc.ac.in/handle/2005/3181.
Council of Science Editors:
Bhat AR. Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3181

University of Illinois – Urbana-Champaign
15.
Taylor, Brian D.
Instability of steady and quasi-steady detonations.
Degree: PhD, 0242, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/18646
► The stability properties and dynamic behavior of steady and quasi-steady detonation theories are investigated through linear stability analysis and numerical simulation. A general, unsteady, three-dimensional…
(more)
▼ The stability properties and dynamic behavior of steady and quasi-steady
detonation theories are investigated through linear stability analysis and numerical simulation.
A general, unsteady, three-dimensional formulation of the reactive Euler equations in a shock-fitted reference frame is derived.
The formulation is specialized to three configurations: planar one-dimensional
detonation, radially symmetric one-dimensional
detonation, and two-dimensional
detonation in a rectangular channel.
High-order convergent numerical simulation schemes for these configurations are derived and used to study the linear and nonlinear stability of detonations.
Shock-fitted numerical simulation is used to study the two-dimensional instability of steady solutions to the Zel'dovich, von Neumann, and Doring (ZND) model of
detonation.
It is demonstrated through several methods of analysis that the dependence of instability growth rates and oscillation frequencies on the initial disturbance wavelength, as predicted by linear stability theory, is quantitatively reproduced by shock-fitted simulations.
Agreement with the theorized temporal and spatial structure of the instability is demonstrated by a functional expansion of the solution perturbations, obtained from simulation data, in terms of the linear stability eigenfunctions.
Three regimes of unstable behavior - linear, weakly non-linear, and fully non-linear - are explored and characterized in terms of the power spectrum of the normal
detonation velocity.
Using solutions obtained from
Detonation Shock Dynamics (DSD) theory, the behavior of cylindrically and spherically expanding symmetric detonations is studied by one-dimensional shock-fitted numerical simulation.
We consider idealized models of gaseous and condensed phase
detonation, as well as a realistic model calibrated for the high explosive PBX-9501.
We study the behavior of detonations initialized with solutions of DSD as they expand radially.
The various models and calibrations exhibit regimes of hydrodynamic stability, in which the
detonation evolves slowly in time and agreement with DSD theory is good, and regimes of instability, which in some cases leads to failure of the
detonation wave.
Advisors/Committee Members: Stewart, Scott (advisor), Stewart, Scott (Committee Chair), Matalon, Moshe (committee member), Austin, Joanna M. (committee member), Pantano-Rubino, Carlos A. (committee member).
Subjects/Keywords: Detonation; Shock-fitting; stability; numerical simulation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Taylor, B. D. (2011). Instability of steady and quasi-steady detonations. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18646
Chicago Manual of Style (16th Edition):
Taylor, Brian D. “Instability of steady and quasi-steady detonations.” 2011. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 05, 2021.
http://hdl.handle.net/2142/18646.
MLA Handbook (7th Edition):
Taylor, Brian D. “Instability of steady and quasi-steady detonations.” 2011. Web. 05 Mar 2021.
Vancouver:
Taylor BD. Instability of steady and quasi-steady detonations. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2142/18646.
Council of Science Editors:
Taylor BD. Instability of steady and quasi-steady detonations. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18646

University of Illinois – Urbana-Champaign
16.
Clemenson, Michael.
Enhancing reactivity of aluminum-based structural energetic materials.
Degree: PhD, Mechanical Engineering, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/78705
► Reactive metals are routinely added in applications such as propellants and explosives to increase energy density and total energy output. These materials are also becoming…
(more)
▼ Reactive metals are routinely added in applications such as propellants and explosives to increase energy density and total energy output. These materials are also becoming useful in warhead casings compared to traditional inert materials because of their ability to enhance weapon output such as peak blast pressure and blast impulse. Aluminum is a good candidate for
such enhanced blast applications involving structural reactive warhead casings due to its high combustion enthalpy; however, under explosive loading, conventional aluminum casings expend little of the energetic potential stored
within the material. In addition, aluminum casings are capable of producing large fragments (on the order of mm's) which can be diffi cult to ignite and are accelerated away from the target, lending no additional reaction
enhancement to the initial blast. This study aims to determine the most e ffective methods of increasing the reactivity of aluminum warhead casings
through modi fication of alloy composition and casing geometry using controlled explosive initiation experiments. The study also explores e ffects of
explosive end confi nement and impact induced fragment reactions. Transient and quasi-static pressure measurements, high speed imaging, and spatially-varying spectroscopy are performed to determine the e ffectiveness of reaction
enhancement for each alloy. In addition, analysis of coarse and fine fragments collected during experiments provides insight into the role of fragmentation
size and distribution on reactivity enhancement of the aluminum materials. Generation of fi ne particles below 10 microns during initial fragmentation is believed to play a key role in the casing reactivity enhancement immediately
following the high explosive
detonation.
Advisors/Committee Members: Glumac, Nick G. (advisor), Glumac, Nick G. (Committee Chair), Krier, Herman (committee member), Stewart, Donald S. (committee member), Lambros, John (committee member).
Subjects/Keywords: Casing; Detonation; Structural Energetic Materials; Combustion; Aluminum
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Clemenson, M. (2015). Enhancing reactivity of aluminum-based structural energetic materials. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78705
Chicago Manual of Style (16th Edition):
Clemenson, Michael. “Enhancing reactivity of aluminum-based structural energetic materials.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 05, 2021.
http://hdl.handle.net/2142/78705.
MLA Handbook (7th Edition):
Clemenson, Michael. “Enhancing reactivity of aluminum-based structural energetic materials.” 2015. Web. 05 Mar 2021.
Vancouver:
Clemenson M. Enhancing reactivity of aluminum-based structural energetic materials. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2142/78705.
Council of Science Editors:
Clemenson M. Enhancing reactivity of aluminum-based structural energetic materials. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78705

Georgia Tech
17.
Schulz, Joseph C.
A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion.
Degree: PhD, Aerospace Engineering, 2015, Georgia Tech
URL: http://hdl.handle.net/1853/53971
► Explosions are a common phenomena in the Universe. Beginning with the Big Bang, one could say the history of the Universe is narrated by a…
(more)
▼ Explosions are a common phenomena in the Universe. Beginning with the Big Bang, one could say the history of the Universe is narrated by a series of explosions. Yet no matter how large, small, or complex, all explosions occur through a series of similar physical processes beginning with their initiation to their dynamical interaction with the environment. Of particular interest to this study is how these processes are modified in a magnetized medium. The role of the magnetic field is investigated in two scenarios. The first scenario addresses how a magnetic field alters the propagation of a gaseous
detonation where the application of interest is the modification of a condensed-phase explosion. The second scenario is focused on the aftermath of the explosion event and addresses how fluid mixing changes in a magnetized medium. A primary focus of this thesis is the development of a numerical tool capable of simulating explosive phenomenon in a magnetized medium. While the magnetohydrodynamic (MHD) equations share many of the mathematical characteristics of the hydrodynamic equations, numerical methods developed for the conservation equations of a magnetized plasma are complicated by the requirement that the magnetic field must be divergent free. The advantages and disadvantages of the proposed method are discussed in relation to explosion applications.
Advisors/Committee Members: Menon, Suresh (advisor), Wise, John (committee member), Walker, Mitchell (committee member), Sun, Wenting (committee member), Lieuwen, Tim (committee member).
Subjects/Keywords: Magnetohydrodynamics; Detonation; Fluid instability; Numerical methods
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schulz, J. C. (2015). A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/53971
Chicago Manual of Style (16th Edition):
Schulz, Joseph C. “A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion.” 2015. Doctoral Dissertation, Georgia Tech. Accessed March 05, 2021.
http://hdl.handle.net/1853/53971.
MLA Handbook (7th Edition):
Schulz, Joseph C. “A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion.” 2015. Web. 05 Mar 2021.
Vancouver:
Schulz JC. A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1853/53971.
Council of Science Editors:
Schulz JC. A study of magnetoplasmadynamic effects in turbulent supersonic flows with application to detonation and explosion. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/53971

Queens University
18.
Pinos, Thomas.
Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
.
Degree: Mechanical and Materials Engineering, 2013, Queens University
URL: http://hdl.handle.net/1974/8116
► Flame propagation through a channel equipped with obstacles was studied experimentally. Two types of obstacle geometries were investigated, i.e., wall-mounted cross-flow cylinders and fence-type obstacles…
(more)
▼ Flame propagation through a channel equipped with obstacles was studied experimentally. Two types of obstacle geometries were investigated, i.e., wall-mounted cross-flow cylinders and fence-type obstacles mounted on the top and bottom channel surfaces. The motivation for this research is its applications to both high-speed propulsion and industrial explosion safety.
The effect of obstacle distribution and blockage ratio on flame acceleration was investigated in a 2.54cm x 7.6cm “narrow” channel with wall-mounted cross-flow cylindrical obstacles. The cylinders were arranged in a “staggered” or “inline” pattern, with blockage ratios of 0.5 and 0.67. Schlieren images were used to study the flame shape and its leading edge velocity for a range of fuel-air mixtures compositions. It was determined that initial flame propagation occurs faster in higher blockage ratios due to the higher frequency perturbation to the flow. Flame acceleration led to different quasi-steady flame and detonation propagation regimes. In general, higher final steady flame velocities were reached in the lower blockage ratios, and detonation limits were found to be influenced by the geometry.
The influence of channel width on flame acceleration was also determined using fence-type obstacles with a single blockage ratio. Experiments were performed in a 2.54cm x 7.6cm and 7.6cm x 7.6cm channel. Schlieren images were again used to study the flame shape and to obtain leading edge velocity. The flame tip was found to have a parabolic profile across the channel width for the narrower channel and flatter profile in the wider channel. It was determined that the channel width has a weak effect on the flame velocity down the channel length. As such, flame acceleration was initially only slightly more pronounced in the narrow channel before the reverse became true later in the wide channel.
Subjects/Keywords: Flame Acceleration
;
Detonation
;
Deflagration
;
Combustion
;
Hydrogen-Air
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pinos, T. (2013). Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8116
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pinos, Thomas. “Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
.” 2013. Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/8116.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pinos, Thomas. “Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
.” 2013. Web. 05 Mar 2021.
Vancouver:
Pinos T. Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
. [Internet] [Thesis]. Queens University; 2013. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/8116.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pinos T. Combustion Wave Propagation Regimes in a Channel equipped with an Array of Cross-flow Cylindrical Obstacles
. [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/8116
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
19.
Nakamura, Tetsu.
Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.
Degree: MS, Aerospace Engineering, 2010, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395
► The Transient Inlet Concept (TIC) involves transient aerodynamics and wave interactions with the objective of producing turbulence, compression and flow in ducted engines at low…
(more)
▼ The Transient Inlet Concept (TIC) involves transient aerodynamics and wave
interactions with the objective of producing turbulence, compression and flow in ducted
engines at low subsonic speeds. This concept relies on the generation and control of
multiple
detonation waves issuing from different ?stages? along a simple ducted engine,
and aims to eliminate the need for compressors at low speeds. Currently, the Zel?dovichvon
Neumann-Doering (ZND) steady, one-dimensional
detonation is the simplest
method of generating the waves issuing from each stage of the TIC device.
This thesis focuses on the primary calculation of a full thermochemistry through a ZND
detonation from an initially unreacted supersonic state, through a discontinuous shock
wave and a subsonic reaction zone, to the final, reacted, equilibrium state. Modeling of
the ZND
detonation is accomplished using Cantera, an open-source object-oriented code
developed at Caltech. The code provides a robust framework for treating
thermodynamics, chemical kinetics, and transport processes, as well as numerical solvers
for various reacting flow problems. The present work examines the effects of chemical
kinetics on the structure of ZND
detonation, by using a detailed chemical kinetics
mechanism that involves 53 species and 325 simultaneous reactions (Gas Research
Institute 3.0). Using a direct integration of the system of inviscid ordinary differential
equations for the ZND
detonation, I obtain results for the combination of different fuels
(hydrogen and methane) and oxidizers (oxygen and air). The detailed thermochemistry results of the calculations are critically examined for use in a future induced-
detonation compression system.
Advisors/Committee Members: Karpetis, Adonios N. (advisor), Bowersox, Rodney B. (committee member), Annamalai, Kalyan (committee member).
Subjects/Keywords: Detonation; Cantera
…1
Single Stage Detonation Generator… …2
Structure of Zel’dovich-von Neumann-Doering Detonation .............................. 4… …37
Structure of H2-O2 ZND Detonation… …39
Structure of H2-Air ZND Detonation… …51
Structure of CH4-O2 ZND Detonation…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nakamura, T. (2010). Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395
Chicago Manual of Style (16th Edition):
Nakamura, Tetsu. “Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.” 2010. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395.
MLA Handbook (7th Edition):
Nakamura, Tetsu. “Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.” 2010. Web. 05 Mar 2021.
Vancouver:
Nakamura T. Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation. [Internet] [Masters thesis]. Texas A&M University; 2010. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395.
Council of Science Editors:
Nakamura T. Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation. [Masters Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395

University of Texas – Austin
20.
Lee, Sangyup.
Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.
Degree: PhD, Mechanical Engineering, 2017, University of Texas – Austin
URL: http://hdl.handle.net/2152/62166
► Multiscale methods which are systematic, computationally efficient, and applicable to a wide range of materials are needed to augment experimental research in the development of…
(more)
▼ Multiscale methods which are systematic, computationally efficient, and applicable to a wide range of materials are needed to augment experimental research in the development of improved explosives and propellants. A variety of modeling methods have been applied to
detonation simulation, but different model formulation techniques are normally used at each scale. This research has developed the first unified discrete Hamiltonian approach to multiscale simulation of reacting shock physics, using a nonholonomic methodology. The method incorporates general material and geometric nonlinearities, which are of central interest in reacting shock modeling applications.
A new synchronous multiscale model has been formulated, which incorporates a macroscale Lagrangian particle-element model, a mesoscale Lagrangian finite element model, and a Lagrangian reacting molecular dynamics model. A new asynchronous multiscale model has been formulated, which incorporates a macroscale Eulerian finite element model, a mesoscale Lagrangian particle-element model, and a Lagrangian reacting molecular dynamics model. The asynchronous model includes new strategies to accommodate the large time and space disparities between scales, and has been validated in simulations which model shock to
detonation in two widely used explosives.
Advisors/Committee Members: Fahrenthold, Eric P. (advisor), Bryant, Michael D. (committee member), Foster, John T. (committee member), Longoria, Raul G. (committee member), Taleff, Eric M. (committee member).
Subjects/Keywords: Multiscale simulation; Shock to detonation; Nonholonomic Hamiltonian
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee, S. (2017). Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/62166
Chicago Manual of Style (16th Edition):
Lee, Sangyup. “Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.” 2017. Doctoral Dissertation, University of Texas – Austin. Accessed March 05, 2021.
http://hdl.handle.net/2152/62166.
MLA Handbook (7th Edition):
Lee, Sangyup. “Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.” 2017. Web. 05 Mar 2021.
Vancouver:
Lee S. Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2152/62166.
Council of Science Editors:
Lee S. Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics. [Doctoral Dissertation]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/62166

Colorado School of Mines
21.
Maestas, Michael.
Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning.
Degree: MS(M.S.), Mechanical Engineering, 2019, Colorado School of Mines
URL: http://hdl.handle.net/11124/173070
► This research was supported by the Electric Power Research Institute (EPRI) into the use of gas explosives as an alternative to solid explosives for slag…
(more)
▼ This research was supported by the Electric Power Research Institute (EPRI) into the use of gas explosives as an alternative to solid explosives for slag removal in industrial cleaning applications. Solid explosives have been shown to cause damage to condenser pipes located within areas of the heat recovery steam generators where slag is present. The gas explosions investigated were a mixture of ethane and oxygen in three configurations of 100L bags. A series of tests were conducted at the Explosive Research Laboratory (ERL) in Idaho Springs, CO to determine if any damage would be caused to condenser pipes in proximity to the blast. Due to the successful demonstration of the gas explosions' viability for cleaning slag and not causing damage to the pipes, EPRI can continue the certification process to use this technology instead of solid explosive for industrial cleaning. The peak incident overpressure and duration of the positive pressure pulse were recorded as a function distance from the bags to characterize the
detonation properties compared to that of solid explosives. The peak pressures at two meters and farther for the gas explosions were comparable to that of the solid explosives with no more than a 5 psi difference. The gas explosions demonstrated longer pulse durations than the solid explosives for all the tests. An Autodyne numerical model was then developed using TNT to compare to the experimental data, which showed good agreement at distances past three meters. However the numerical simulation was not able to capture the duration of the positive pulse as seen in the gas explosions. It was also shown that the gas explosions did not cause any damage to the condenser pipes in the experimental testing.
Advisors/Committee Members: Berger, John R. (advisor), Petr, Vilem (committee member), Tucker, Garritt J. (committee member).
Subjects/Keywords: deflagration; ethane; industrial cleaning; detonation; boiler; gas
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Maestas, M. (2019). Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/173070
Chicago Manual of Style (16th Edition):
Maestas, Michael. “Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning.” 2019. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021.
http://hdl.handle.net/11124/173070.
MLA Handbook (7th Edition):
Maestas, Michael. “Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning.” 2019. Web. 05 Mar 2021.
Vancouver:
Maestas M. Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning. [Internet] [Masters thesis]. Colorado School of Mines; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11124/173070.
Council of Science Editors:
Maestas M. Investigation and analysis for the use of ethane-oxygen gas explosion for industrial cleaning. [Masters Thesis]. Colorado School of Mines; 2019. Available from: http://hdl.handle.net/11124/173070

University of Cincinnati
22.
GLASER, AARON J.
PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS.
Degree: PhD, Engineering : Aerospace Engineering, 2007, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1177032411
► Experimental research was performed to investigate the feasibility of using pulse detonation based engine systems for practical aerospace applications. In order to carry out this…
(more)
▼ Experimental research was performed to investigate the
feasibility of using pulse
detonation based engine systems for
practical aerospace applications. In order to carry out this work a
new pulse
detonation combustion research facility was developed at
the University of Cincinnati. This research covered two broad areas
of application interest. The first area is pure PDE applications
where the
detonation tube is used to generate an impulsive thrust
directly. The second focus area is on pulse
detonation based hybrid
propulsion systems. Within each of these areas various studies were
performed to quantify engine performance. Comparisons of the
performance between
detonation and conventional deflagration based
engine cycles were made. Fundamental studies investigating
detonation physics and flow dynamics were performed in order to
gain physical insight into the observed performance trends.
Experimental studies were performed on PDE-driven straight and
diverging ejectors to determine the system performance. Ejector
performance was quantified by thrust measurements made using a
damped thrust stand. The effects of PDE operating parameters and
ejector geometric parameters on thrust augmentation were
investigated. For all cases tested, the maximum thrust augmentation
is found to occur at a downstream ejector placement. The optimum
ejector geometry was determined to have an overall length of
LEJECT/DEJECT=5.61, including an intermediate-straight section
length of LSTRT/DEJECT=2, and diverging exhaust section with 4 deg
half-angle. A maximum thrust augmentation of 105% was observed
while employing the optimized ejector geometry and operating the
PDE at a fill-fraction of 0.6 and a frequency of 10 Hz. When
operated at a fill-fraction of 1.0 and a frequency of 30 Hz, the
thrust augmentation of the optimized PDE-driven ejector system was
observed to be 71%. Static pressure was measured along the interior
surface of the ejector, including the inlet and exhaust sections.
The diverging ejector pressure distribution shows that the
diverging section acts as a subsonic diffuser. To provide a better
explanation of the observed performance trends, shadowgraph images
of the
detonation wave and starting vortex interacting with the
ejector inlet were obtained. The acoustic signature of a pulse
detonation engine was characterized in both the near-field and
far-field regimes. Experimental measurements were performed in an
anechoic test facility designed for jet noise testing. Both shock
strength and speed were mapped as a function of radial distance and
direction from the PDE exhaust plane. It was found that the PDE
generated pressure field can be reasonably modeled by a theoretical
point-source explosion. The effect of several exit nozzle
configurations on the PDE acoustic signature was studies. These
included various chevron nozzles, a perforated nozzle, and a set of
proprietary noise attenuation mufflers. Experimental studies were
carried out to investigate the performance of a hybrid propulsion
system integrating an axial flow turbine with…
Advisors/Committee Members: Gutmark, Dr. Ephraim (Advisor).
Subjects/Keywords: Pulse Detonation Engines
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APA (6th Edition):
GLASER, A. J. (2007). PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1177032411
Chicago Manual of Style (16th Edition):
GLASER, AARON J. “PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS.” 2007. Doctoral Dissertation, University of Cincinnati. Accessed March 05, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1177032411.
MLA Handbook (7th Edition):
GLASER, AARON J. “PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS.” 2007. Web. 05 Mar 2021.
Vancouver:
GLASER AJ. PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS. [Internet] [Doctoral dissertation]. University of Cincinnati; 2007. [cited 2021 Mar 05].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1177032411.
Council of Science Editors:
GLASER AJ. PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE
DETONATION BASED ENGINE SYSTEMS. [Doctoral Dissertation]. University of Cincinnati; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1177032411

King Abdullah University of Science and Technology
23.
Faria, Luiz.
Qualitative and Asymptotic Theory of Detonations.
Degree: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, 2014, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/335798
► Shock waves in reactive media possess very rich dynamics: from formation of cells in multiple dimensions to oscillating shock fronts in one-dimension. Because of the…
(more)
▼ Shock waves in reactive media possess very rich dynamics: from formation of cells in multiple dimensions to oscillating shock fronts in one-dimension. Because of the extreme complexity of the equations of combustion theory, most of the current understanding of unstable
detonation waves relies on extensive numerical simulations of the reactive compressible Euler/Navier-Stokes equations. Attempts at a simplified theory have been made in the past, most of which are very successful in describing steady
detonation waves. In this work we focus on obtaining simplified theories capable of capturing not only the steady, but also the unsteady behavior of
detonation waves.
The first part of this thesis is focused on qualitative theories of
detonation, where ad hoc models are proposed and analyzed. We show that equations as simple as a forced Burgers equation can capture most of the complex phenomena observed in detonations. In the second part of this thesis we focus on rational theories, and derive a weakly nonlinear model of multi-dimensional detonations. We also show, by analysis and numerical simulations, that the asymptotic equations provide good quantitative predictions.
Advisors/Committee Members: Kasimov, Aslan R. (advisor), Samtaney, Ravi (committee member), Ketcheson, David I. (committee member), Keyes, David E. (committee member).
Subjects/Keywords: detonation; Stability; chaos; shock waves; asymptotics
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Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Faria, L. (2014). Qualitative and Asymptotic Theory of Detonations. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/335798
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Faria, Luiz. “Qualitative and Asymptotic Theory of Detonations.” 2014. Thesis, King Abdullah University of Science and Technology. Accessed March 05, 2021.
http://hdl.handle.net/10754/335798.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Faria, Luiz. “Qualitative and Asymptotic Theory of Detonations.” 2014. Web. 05 Mar 2021.
Vancouver:
Faria L. Qualitative and Asymptotic Theory of Detonations. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10754/335798.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Faria L. Qualitative and Asymptotic Theory of Detonations. [Thesis]. King Abdullah University of Science and Technology; 2014. Available from: http://hdl.handle.net/10754/335798
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington
24.
Washington, Malik Rashad.
Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.
Degree: 2019, University of Washington
URL: http://hdl.handle.net/1773/43625
► Radial propellant injection in the annular combustion chamber of a rotating detonation engine (RDE), done in a manner to promote maximum size scale of vortices,…
(more)
▼ Radial propellant injection in the annular combustion chamber of a rotating
detonation engine (RDE), done in a manner to promote maximum size scale of vortices, has proven to be effective for gaseous propellants. Experiments with an RDE having a 154-mm-diameter annular combustion chamber have explored the dependence of
detonation zone location on propellant mass flux using gaseous methane and oxygen. Computational fluid dynamic simulations of the non-reacting flows of these experiments estimate that the degree of propellant mixedness at the leading edge of the
detonation zone must be between approximately 0.5 and 1.5 standard deviations from stoichiometric. This computational tool was also used to examine the mixing of gases that were radially injected into a smaller RDE having a 76-mm-diameter annular combustor. The smaller RDE is designed for parametric studies of injector configurations, which may or may not be configured for radial injection. The results of this study indicate that staggered radial injectors lead to more rapid mixing compared to impinging radial injectors in annular ducts and that decreasing mass flux reduces the mixing length.
Advisors/Committee Members: Knowlen, Carl (advisor).
Subjects/Keywords: CFD; Detonation Zone; Mixing; RDE; Rotating Detonation Engine; UWRDE; Aerospace engineering; Engineering; Aeronautics and astronautics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Washington, M. R. (2019). Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/43625
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Washington, Malik Rashad. “Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.” 2019. Thesis, University of Washington. Accessed March 05, 2021.
http://hdl.handle.net/1773/43625.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Washington, Malik Rashad. “Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.” 2019. Web. 05 Mar 2021.
Vancouver:
Washington MR. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. [Internet] [Thesis]. University of Washington; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1773/43625.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Washington MR. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. [Thesis]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/43625
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland
25.
Fievisohn, Robert.
Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields.
Degree: Aerospace Engineering, 2016, University of Maryland
URL: http://hdl.handle.net/1903/19071
► As turbine and rocket engine technology matures, performance increases between successive generations of engine development are becoming smaller. One means of accomplishing significant gains in…
(more)
▼ As turbine and rocket engine technology matures, performance increases between successive generations of engine development are becoming smaller. One means of accomplishing significant gains in thermodynamic performance and power density is to use
detonation-based heat release instead of deflagration. This work is focused on developing and applying theoretical models to aid in the design and understanding of Rotating
Detonation Engines (RDEs). In an RDE, a
detonation wave travels circumferentially along the bottom of an annular chamber where continuous injection of fresh reactants sustains the
detonation wave. RDEs are currently being designed, tested, and studied as a viable option for developing a new generation of turbine and rocket engines that make use of
detonation heat release. One of the main challenges in the development of RDEs is to understand the complex flowfield inside the annular chamber. While simplified models are desirable for obtaining timely performance estimates for design analysis, one-dimensional models may not be adequate as they do not provide flow structure information. In this work, a two-dimensional physics-based model is developed, which is capable of modeling the curved oblique shock wave, exit swirl, counter-flow,
detonation inclination, and varying pressure along the inflow boundary. This is accomplished by using a combination of shock-expansion theory, Chapman-Jouguet
detonation theory, the Method of Characteristics (MOC), and other compressible flow equations to create a shock-fitted numerical algorithm and generate an RDE flowfield. This novel approach provides a numerically efficient model that can provide performance estimates as well as details of the large-scale flow structures in seconds on a personal computer. Results from this model are validated against high-fidelity numerical simulations that may require a high-performance computing framework to provide similar performance estimates. This work provides a designer a new tool to conduct large-scale parametric studies to optimize a design space before conducting computationally-intensive, high-fidelity simulations that may be used to examine additional effects. The work presented in this thesis not only bridges the gap between simple one-dimensional models and high-fidelity full numerical simulations, but it also provides an effective tool for understanding and exploring RDE flow processes.
Advisors/Committee Members: Yu, Kenneth (advisor).
Subjects/Keywords: Aerospace engineering; analytical; detonation; method of characteristics; parametric study; propulsion; rotating detonation engine
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fievisohn, R. (2016). Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19071
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fievisohn, Robert. “Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields.” 2016. Thesis, University of Maryland. Accessed March 05, 2021.
http://hdl.handle.net/1903/19071.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fievisohn, Robert. “Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields.” 2016. Web. 05 Mar 2021.
Vancouver:
Fievisohn R. Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1903/19071.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fievisohn R. Development and Application of Theoretical Models for Rotating Detonation Engine Flowfields. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/19071
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cincinnati
26.
Anand, Vijay G.
Rotating Detonation Combustor Mechanics.
Degree: PhD, Engineering and Applied Science: Aerospace
Engineering, 2018, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548
► Recent years have witnessed a notable increase in endeavors resorted to investigating unsteady combustion/pressure processes that offer a prospective increase in stagnation pressure due to…
(more)
▼ Recent years have witnessed a notable increase in
endeavors resorted to investigating unsteady combustion/pressure
processes that offer a prospective increase in stagnation pressure
due to a more efficient combustion of fuel. One such pressure gain
combustion (PGC) concept is a rotating
detonation combustor (RDC).
RDCs make use of a rotating
detonation wave that travels
circumferentially about a hollow or annular chamber at kilohertz
frequencies, continually combusting the supplied reactants without
the need for more than one initial ignition event. Due to its
simplicity in design, which can be integrated into existing
systems’ architecture, and the lack of moving mechanical
components, RDCs are at the forefront of PGC research. The current
dissertation deals with the basic mechanics of these combustors.
Specifically, the diverse modes of detonative operation in annular
and hollow combustor configurations are experimentally studied, and
the variables dictating these modes are extracted. The question of
what exactly constitutes a rotating
detonation combustor is
answered, by “converting” a conventional atmospheric deflagrative
hollow combustor into an RDC. Further, based on this demonstration,
the numerous kinships between RDC operation and decades of
observations pertaining to high frequency combustion instabilities
in rocket engines are presented and discussed. It is argued that
most of the poorly understood phenomena of high frequency
instabilities can be explained by
detonation-based physics.
Finally, evidence is presented that suggests rotating detonations
to be type of near-limit
detonation behavior. The findings of this
study are proposed to be useful for the three different communities
of RDC research, rocket engine instabilities and fundamental
detonation physics.
Advisors/Committee Members: Gutmark, Ephraim (Committee Chair).
Subjects/Keywords: Aerospace Materials; Rotating Detonation Engine; Pressure Gain Combustion; Combustion Instability; Detonation Physics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Anand, V. G. (2018). Rotating Detonation Combustor Mechanics. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548
Chicago Manual of Style (16th Edition):
Anand, Vijay G. “Rotating Detonation Combustor Mechanics.” 2018. Doctoral Dissertation, University of Cincinnati. Accessed March 05, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548.
MLA Handbook (7th Edition):
Anand, Vijay G. “Rotating Detonation Combustor Mechanics.” 2018. Web. 05 Mar 2021.
Vancouver:
Anand VG. Rotating Detonation Combustor Mechanics. [Internet] [Doctoral dissertation]. University of Cincinnati; 2018. [cited 2021 Mar 05].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548.
Council of Science Editors:
Anand VG. Rotating Detonation Combustor Mechanics. [Doctoral Dissertation]. University of Cincinnati; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548
27.
Polley, Nolan Lee.
Detonation Diffraction into a Confined Volume.
Degree: MS, Mechanical Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714
► Detonation diffraction has been, and remains, an active area of research. However, detonation diffraction into a confined volume, and specifically the transformation of a planar…
(more)
▼ Detonation diffraction has been, and remains, an active area of research. However,
detonation diffraction into a confined volume, and specifically the transformation of a planar
detonation into a cylindrical
detonation, is an area which has received little attention. Experimental work needs to be conducted on
detonation diffraction into a confined volume to better understand how the interaction of the diffracted shock wave with a confining wall impacts the
detonation diffraction process. Therefore, a facility was constructed to study this problem, and experiments were conducted to determine under what conditions a planar
detonation could be successfully transformed into a cylindrical
detonation. Four different fuel-oxidizer mixtures, C₂H₂+ 2.5 O₂, C₂H₂+ 4 O₂, C₂H₄+ 3 O₂ and H₂+ 0.5 O₂, were tested in this study using a combination of pressure transducers and soot foil records as diagnostics. Three different regimes of successful transmission; spontaneous re-ignition, continuous reflected re-initiation, and discontinuous reflected re-initiation, were identified. The
detonation cell size and the distance from the tube exit to the confining wall, or gap size, were determined to be the most important parameters in the transmission process and a linear correlation for determining whether or not transmission will be successful for a given set of initial conditions was developed for gap sizes between 10 and 35 mm. For gap sizes smaller than 10 mm or gap size larger than 35 mm the linear correlation does not apply. Finally, the results of this study are compared to results on
detonation diffraction into a confined volume available in the literature and explanations for any disagreements are given. This study showed that when compared to transmission of a
detonation into an unconfined volume, the transmission of a
detonation into a confined volume, for the majority of gap sizes, is possible for a wider range of conditions. However, for extremely small gap sizes, when compared to transmission into an unconfined volume, the range of conditions for which successful transmission is possible into a confined volume is actually narrower.
Advisors/Committee Members: Petersen, Eric L. (advisor), Mannan, Mahboobul S. (committee member), Morrison, Gerald L. (committee member).
Subjects/Keywords: Detonation diffraction; confined volume; transmission; cylindrical detonation
…vii
NOMENCLATURE
λ
Detonation cell size
λs
Critical detonation cell size for… …transmission of a planar detonation
into an unconfined volume
w
Width of confined volume
d… …Diameter of obstacle
D
Diameter of detonation tube
viii
TABLE OF CONTENTS
Page
ABSTRACT… …1
Detonation Cellular Structure… …8
Introduction to Detonation Diffraction…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Polley, N. L. (2012). Detonation Diffraction into a Confined Volume. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714
Chicago Manual of Style (16th Edition):
Polley, Nolan Lee. “Detonation Diffraction into a Confined Volume.” 2012. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714.
MLA Handbook (7th Edition):
Polley, Nolan Lee. “Detonation Diffraction into a Confined Volume.” 2012. Web. 05 Mar 2021.
Vancouver:
Polley NL. Detonation Diffraction into a Confined Volume. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714.
Council of Science Editors:
Polley NL. Detonation Diffraction into a Confined Volume. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714

Missouri University of Science and Technology
28.
Gross, Jeffrey Thomas.
Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes.
Degree: M.S. in Aerospace Engineering, Aerospace Engineering, Missouri University of Science and Technology
URL: https://scholarsmine.mst.edu/masters_theses/3735
"The purpose of this thesis is to present experimental measurements and analytical calculations of thrust, pressure, and wave speed from a single-pulse detonation. In addition, it will present an analytical discussion of the effects of friction on detonation tube performance" – Abstract, page iii.
Subjects/Keywords: Detonation tube; Pulsed detonation engine; Aerospace Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Gross, J. T. (n.d.). Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes. (Masters Thesis). Missouri University of Science and Technology. Retrieved from https://scholarsmine.mst.edu/masters_theses/3735
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Chicago Manual of Style (16th Edition):
Gross, Jeffrey Thomas. “Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes.” Masters Thesis, Missouri University of Science and Technology. Accessed March 05, 2021.
https://scholarsmine.mst.edu/masters_theses/3735.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
MLA Handbook (7th Edition):
Gross, Jeffrey Thomas. “Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes.” Web. 05 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Gross JT. Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes. [Internet] [Masters thesis]. Missouri University of Science and Technology; [cited 2021 Mar 05].
Available from: https://scholarsmine.mst.edu/masters_theses/3735.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Council of Science Editors:
Gross JT. Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes. [Masters Thesis]. Missouri University of Science and Technology; Available from: https://scholarsmine.mst.edu/masters_theses/3735
Note: this citation may be lacking information needed for this citation format:
No year of publication.
29.
Tang, Justin.
Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
.
Degree: 2013, University of Ottawa
URL: http://hdl.handle.net/10393/24256
► The instability behaviour of detonation waves are studied using Fickett's model with a 2-step reaction model with separately controlled induction and reaction zones. This model…
(more)
▼ The instability behaviour of detonation waves are studied using Fickett's model with a 2-step reaction model with separately controlled induction and reaction zones. This model acts as a simplified toy-model to the reactive Euler equations allowing for more clarity of the detonation phenomenon.
We numerically simulate a 1D self-supported detonation and investigate the pulsating instability behaviour. We are able to clarify the governing mechanism behind the pulsations through a characteristic analysis describing the coupling that takes place between the amplification of the compressions waves and the alteration to the induction timing. We examine the acceleration phase of the pulsations and determine an analytical solution to describe the strength of the amplification. Fickett's model is as well shown to reproduce the same period doubling bifurcation with increasing sensitivity of the induction rate, and route to chaos as seen in the full reactive Euler equations.
Subjects/Keywords: Fickett;
Fickett's model;
detonation analogue;
detonation instability
…The Chapman-Jouguet (CJ) detonation velocity.
H(): The Heaviside… …steady Chapman-Jouguet detonation frame.
viii
Chapter 1
Introduction
The focus of this work… …detonation waves in 1D are modeled using Fickett’s mathematical model,
which serves as a simplified… …Study of detonations
Detonation waves are self-sustained supersonic reaction waves. While… …compression
or expansion waves that is the main mechanism behind detonation propagation. The basic…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tang, J. (2013). Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/24256
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tang, Justin. “Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
.” 2013. Thesis, University of Ottawa. Accessed March 05, 2021.
http://hdl.handle.net/10393/24256.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tang, Justin. “Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
.” 2013. Web. 05 Mar 2021.
Vancouver:
Tang J. Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
. [Internet] [Thesis]. University of Ottawa; 2013. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10393/24256.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tang J. Study of the Instability and Dynamics of Detonation Waves using Fickett's Analogue to the Reactive Euler Equations
. [Thesis]. University of Ottawa; 2013. Available from: http://hdl.handle.net/10393/24256
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign
30.
Holman, Steven B.
On the calibration of some ideal and non-ideal explosives.
Degree: MS, 0242, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/18586
► The initial portion of this work will expound a concise, albeit limited, introduction to energetic materials, from their background and the reasons they are studied…
(more)
▼ The initial portion of this work will expound a concise, albeit limited, introduction to energetic
materials, from their background and the reasons they are studied to the modern
developments used in the work of this thesis. Today there are several reason why these
materials are studied. The immense amount of chemical energy present in these materials,
if harnessed appropriately, would be greatly beneficial to people and society. Due to some
current uses of these materials it is clear that they will be around for some time. Therefore
safety in handling, storage and transportation is of paramount importance. It would also
be remiss to neglect the beneficial uses these materials have in applications such as mining
and construction, propulsion, avalanche control, and a myriad of other uses.
This thesis will predominantly present two main issues, the characterization of several
energetic materials and a parameter study for the effects of model equation of state parameters
on the behavior of a detonating process. To do this not only required background in
the mathematical modeling but also the physical foundation of the material, through their
equations of state. These were largely based on the prior work of W. C. Davis but have
been added to significantly by many people, as mentioned later. The reaction rate laws
present also had their roots in earlier work. This is especially true for the modified Ignition
and Growth (I&G) model, largely developed by members of the D. S. Stewart group at the
University of Illinois in Urbana-Champaign. Prominent notable research is also presented
along the way that either provides much of the necessary background or as a source of
the data used to produce the outcome of this thesis. Additionally, a very brief description
of some of the experimental procedures for collecting data are discussed, as well as their
ii
interplay with certain theoretical models. The effective modeling of these materials would
not have been possible without a synergy between theoretical, numerical and experimental
aspects.
Finally the calibrations of various explosives are presented. It is through these materials
that the effectiveness of the models is determined, as it is required that the models reproduce
well the experimental data. Many of these experimental characteristics that were measured
in the lab are also recreated, along side simulated data, in the software tool DSDTOOLS .
Through the course of calibrating these materials, the differing aspects of these materials
become more transparent. The calibration process was necessary to see which materials
are insensitive, which are initiated to
detonation upon impact quickest, and several other
characteristics that manifest themselves through the calibration procedures.
Advisors/Committee Members: Stewart, Donald S. (advisor).
Subjects/Keywords: detonation; detonation shock dynamics; pbx 9501; pbx 9502; pbx n111; IM-1; pbx n9; reaction zone; DSDTOOLS
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APA (6th Edition):
Holman, S. B. (2011). On the calibration of some ideal and non-ideal explosives. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18586
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Holman, Steven B. “On the calibration of some ideal and non-ideal explosives.” 2011. Thesis, University of Illinois – Urbana-Champaign. Accessed March 05, 2021.
http://hdl.handle.net/2142/18586.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Holman, Steven B. “On the calibration of some ideal and non-ideal explosives.” 2011. Web. 05 Mar 2021.
Vancouver:
Holman SB. On the calibration of some ideal and non-ideal explosives. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2142/18586.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Holman SB. On the calibration of some ideal and non-ideal explosives. [Thesis]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18586
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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