subject:(Detonation)

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

► 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: Casing; Detonation; Structural Energetic Materials; Combustion; Aluminum

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APA (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: Magnetohydrodynamics; Detonation; Fluid instability; Numerical methods

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APA (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: Flame Acceleration ; Detonation ; Deflagration ; Combustion ; Hydrogen-Air

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APA (6^th 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 (16^th 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 (7^th 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)

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…

10 more images…

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APA (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: Multiscale simulation; Shock to detonation; Nonholonomic Hamiltonian

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APA (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: deflagration; ethane; industrial cleaning; detonation; boiler; gas

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APA (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: detonation; Stability; chaos; shock waves; asymptotics

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APA (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: CFD; Detonation Zone; Mixing; RDE; Rotating Detonation Engine; UWRDE; Aerospace engineering; Engineering; Aeronautics and astronautics

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APA (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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)

Subjects/Keywords: Aerospace Materials; Rotating Detonation Engine; Pressure Gain Combustion; Combustion Instability; Detonation Physics

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APA (6^th 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 (16^th 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 (7^th 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 (6^th 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 (16^th 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 (7^th 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 Manager

APA (6^th 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 (16^th 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 (7^th 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)

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 (6^th 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 (16^th 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 (7^th 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 · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th 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 (7^th 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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Open Access Theses and Dissertations