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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

Saenz JA. Detonation shock and ignition dynamics in condensed phase explosives. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2019 Jul 19]. 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 Cincinnati

2. 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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

GLASER AJ. PERFORMANCE AND ENVIRONMENTAL IMPACT ASSESSMENT OF PULSE DETONATION BASED ENGINE SYSTEMS. [Internet] [Doctoral dissertation]. University of Cincinnati; 2007. [cited 2019 Jul 19]. 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

University of Notre Dame

3. Christopher Michael Romick. On the Effect of Diffusion on Gaseous Detonation</h1>.

Degree: PhD, 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>. (Doctoral Dissertation). University of Notre Dame. Retrieved from https://curate.nd.edu/show/z603qv36b4f

Chicago Manual of Style (16^th Edition):

Romick, Christopher Michael. “On the Effect of Diffusion on Gaseous Detonation</h1>.” 2015. Doctoral Dissertation, University of Notre Dame. Accessed July 19, 2019. https://curate.nd.edu/show/z603qv36b4f.

MLA Handbook (7^th Edition):

Romick, Christopher Michael. “On the Effect of Diffusion on Gaseous Detonation</h1>.” 2015. Web. 19 Jul 2019.

Vancouver:

Romick CM. On the Effect of Diffusion on Gaseous Detonation</h1>. [Internet] [Doctoral dissertation]. University of Notre Dame; 2015. [cited 2019 Jul 19]. Available from: https://curate.nd.edu/show/z603qv36b4f.

Council of Science Editors:

Romick CM. On the Effect of Diffusion on Gaseous Detonation</h1>. [Doctoral Dissertation]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/z603qv36b4f

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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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: 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. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155511

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):

Horowitz, Steven Michael. “Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics.” 2015. Thesis, Texas A&M University. Accessed July 19, 2019. http://hdl.handle.net/1969.1/155511.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Horowitz, Steven Michael. “Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics.” 2015. Web. 19 Jul 2019.

Vancouver:

Horowitz SM. Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/1969.1/155511.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Horowitz SM. Use of a High-Purity Germanium Semiconductor Detector for Rapid Post-Nuclear Event Forensics. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155511

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University

7. 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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

Cross M. Detonation Hazard Classification Based On The Critical Orifice Plate Diameter For Detonation Propagation . [Internet] [Thesis]. Queens University; 2015. [cited 2019 Jul 19]. 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

Queens University

8. Rainsford, Georgina. Visualization of Detonation Propagation in a Round Tube Equipped with Repeating Orifice Plates .

Degree: Mechanical and Materials Engineering, Queens University

URL: http://hdl.handle.net/1974/22665

► This study used self-luminous high-speed photography to visualize quasi-detonation propagation and deflagration-to-detonation transition (DDT) in a transparent round tube equipped with repeating orifice plates. Experiments… (more)

▼ This study used self-luminous high-speed photography to visualize quasi-detonation propagation and deflagration-to-detonation transition (DDT) in a transparent round tube equipped with repeating orifice plates. Experiments were conducted in a combustion channel consisting of a 3.16 m square channel with a 7.6 cm by 7.6 cm cross-section connected to a 1.55 m cylindrical channel filled with orifice plates. Rectangular ‘fence-type’ obstacles were installed on the top and bottom of the square channel with a 3.8 cm opening between them. Two sets of orifice plates with different diameters, d, representing different blockage ratios (BR) were tested (d=5.33 cm for 50% BR and 3.81 cm for 75% BR orifice plates). Stoichiometric hydrogen-oxygen mixtures at initial pressures of 4–60 kPa were ignited at one end of the combustion channel. Average propagation velocities were derived from shock-time-of-arrival measurements using pressure transducers in the square channel and high-speed video filmed through the round tube. As established in literature, a substantially higher orifice-diameter-to-detonation-cell-size ratio (d/λ) was observed for the 75% BR tests (d/λ=14) than the 50% BR tests (d/λ=1.4) and Peraldi’s d/λ≥1 criterion for the DDT limit. Video footage revealed that this difference may be attributed to a difference in near-limit detonation initiation modes: at 75% BR, detonation initiation occurred on the orifice face after shock reflection, whereas at 50% BR, detonation initiation occurred on the tube wall between orifice plates. Synchronized high-speed video and soot foils allowed for the classification of quasi-detonation propagation modes. At 50% BR, as initial pressure increased, fast-flame propagation transitioned to single-hot-spot wall ignition detonation to multi-hot-spot wall ignition detonation, and finally to continuous detonation propagation. A similar progression was observed at 75% BR, except that obstacle face ignition detonations occurred between the fast-flame and single-hot-spot regimes, and continuous detonations were not observed as tube strength concerns limited the maximum initial test pressure. For a continuous detonation, a higher average velocity was observed in the round tube than the square channel, which can be attributed to the effect of wave curvature during detonation diffraction past an obstacle (2D diffraction in the square channel compared to 3D diffraction in the round tube).

Subjects/Keywords: detonation propagation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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.

Penn State University

9. O'Connor, Patrick Dennis. Direct numerical investigation of detonation waves using a Monte Carlo method.

Degree: PhD, Chemistry, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8788

► A detonation wave describes a shock that propagates at supersonic velocity through a chemically unstable gas medium and is driven by the energy released by… (more)

▼ A detonation wave describes a shock that propagates at supersonic velocity through a chemically unstable gas medium and is driven by the energy released by the chemical reactions within the wave. A Monte Carlo algorithm has been developed to directly model the physics and chemistry of detonations to a level of detail never before accomplished. The direct simulation Monte Carlo method is used to accurately model the coupled gas dynamic-chemical kinetic behavior found in detonation waves generated in high velocity flows with sharp gradients of velocity, temperature, density, composition, etc. Direct simulation Monte Carlo is a stochastic, particle-based method capable of simulating the full microscopic details of rarefied gas flows. Previous work with this algorithm was found to be in excellent agreement with the Chapman-Jouguet and Zeldovich-von Neumann-Doring theoretically predicted temperatures and detonation velocities for detonation waves in which the shock region precedes the reaction region. In order to extend from simple one-step reaction driven detonation waves to more realistic systems such as the 34-reaction, 5-step hydrogen-chlorine reaction, several modifications have been made to the Monte Carlo algorithm. The addition of phenomenological energy models has allowed particles to exhibit the behavior of diatomic and polyatomic molecules. Several reaction models have been investigated in order to accurately calculate reaction rates drawn from experimental mechanisms. In addition, several reactions types have been added including bimolecular, dissociation and recombination interactions. Modifications have also been made to model mixtures containing particles with realistic molecular properties such as mass, diameter, internal degrees of freedom, and rates of exchange of internal energy. The direct simulation Monte Carlo method has been used to investigate the hydrogen-chlorine mechanism in systems with and without flow. Detonation profiles have been examined in detail in order to study initiation sources, boundary effects, the interaction between shock and reaction regions, and reaction sensitivity. Detonation velocities, peak detonation temperatures and particle distributions across the detonation front have also been studied. The results obtained are promising and indicate that calculations using this Monte Carlo method are feasible for other complex reaction systems.

Subjects/Keywords: DSMC; Monte Carlo; detonation

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APA (6^th Edition):

O'Connor, P. D. (2008). Direct numerical investigation of detonation waves using a Monte Carlo method. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8788

Chicago Manual of Style (16^th Edition):

O'Connor, Patrick Dennis. “Direct numerical investigation of detonation waves using a Monte Carlo method.” 2008. Doctoral Dissertation, Penn State University. Accessed July 19, 2019. https://etda.libraries.psu.edu/catalog/8788.

MLA Handbook (7^th Edition):

O'Connor, Patrick Dennis. “Direct numerical investigation of detonation waves using a Monte Carlo method.” 2008. Web. 19 Jul 2019.

Vancouver:

O'Connor PD. Direct numerical investigation of detonation waves using a Monte Carlo method. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2019 Jul 19]. Available from: https://etda.libraries.psu.edu/catalog/8788.

Council of Science Editors:

O'Connor PD. Direct numerical investigation of detonation waves using a Monte Carlo method. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8788

University of Sydney

10. 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…

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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

Piper SJA. Oscillatory Shock Initiated Detonation Engine: Conception, Design and Cycle Analysis . [Internet] [Thesis]. University of Sydney; 2016. [cited 2019 Jul 19]. 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

McGill University

11. Donato, Marc. The influence of confinement on the propagation of near limit detonation waves.

Degree: PhD, Department of Mechanical Engineering, 1982, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile68687.pdf

►

This thesis reports on a detailed experimental investigation of near limit ethylene-air detonation phenomena in tubes. The different detonation regimes were determined as a function… (more)

Subjects/Keywords: Detonation waves.

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APA (6^th Edition):

Donato, M. (1982). The influence of confinement on the propagation of near limit detonation waves. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile68687.pdf

Chicago Manual of Style (16^th Edition):

Donato, Marc. “The influence of confinement on the propagation of near limit detonation waves.” 1982. Doctoral Dissertation, McGill University. Accessed July 19, 2019. http://digitool.library.mcgill.ca/thesisfile68687.pdf.

MLA Handbook (7^th Edition):

Donato, Marc. “The influence of confinement on the propagation of near limit detonation waves.” 1982. Web. 19 Jul 2019.

Vancouver:

Donato M. The influence of confinement on the propagation of near limit detonation waves. [Internet] [Doctoral dissertation]. McGill University; 1982. [cited 2019 Jul 19]. Available from: http://digitool.library.mcgill.ca/thesisfile68687.pdf.

Council of Science Editors:

Donato M. The influence of confinement on the propagation of near limit detonation waves. [Doctoral Dissertation]. McGill University; 1982. Available from: http://digitool.library.mcgill.ca/thesisfile68687.pdf

University of Illinois – Urbana-Champaign

12. Lieber, Mark A. Tools for modeling reactive materials: detonation initiation and chemical kinetics.

Degree: MS, 0133, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16942

► In this thesis I will explore a variety of topics. First will be a comparison between simulations and experiments using a program called ALE3D. In… (more)

Subjects/Keywords: Detonation; Ignition; Chemical Kinetics

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APA (6^th Edition):

Lieber, M. A. (2010). Tools for modeling reactive materials: detonation initiation and chemical kinetics. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16942

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):

Lieber, Mark A. “Tools for modeling reactive materials: detonation initiation and chemical kinetics.” 2010. Thesis, University of Illinois – Urbana-Champaign. Accessed July 19, 2019. http://hdl.handle.net/2142/16942.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lieber, Mark A. “Tools for modeling reactive materials: detonation initiation and chemical kinetics.” 2010. Web. 19 Jul 2019.

Vancouver:

Lieber MA. Tools for modeling reactive materials: detonation initiation and chemical kinetics. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2010. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/2142/16942.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lieber MA. Tools for modeling reactive materials: detonation initiation and chemical kinetics. [Thesis]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16942

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah

13. 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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

Beckvermit J. Computational modeling of the explosion and detonation of high explosives. [Internet] [Doctoral dissertation]. University of Utah; 2016. [cited 2019 Jul 19]. 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

The Ohio State University

14. Naples, Andrew G. Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures.

Degree: MS, Mechanical Engineering, 2008, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213018027

► An experimental study was done to examine the effects of elevated initial tube pressure in the PDE. Measured parameters were the ignition time, DDT run-up… (more)

Subjects/Keywords: Engineering; Mechanical Engineering; Aircraft Propulsion; Pulse Detonation; Detonation; PDE

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APA (6^th Edition):

Naples, A. G. (2008). Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1213018027

Chicago Manual of Style (16^th Edition):

Naples, Andrew G. “Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures.” 2008. Masters Thesis, The Ohio State University. Accessed July 19, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213018027.

MLA Handbook (7^th Edition):

Naples, Andrew G. “Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures.” 2008. Web. 19 Jul 2019.

Vancouver:

Naples AG. Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures. [Internet] [Masters thesis]. The Ohio State University; 2008. [cited 2019 Jul 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213018027.

Council of Science Editors:

Naples AG. Detonation Initiation in a Pulse Detonation Engine with Elevated Initial Pressures. [Masters Thesis]. The Ohio State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213018027

15. Nakamura, Tetsu. Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.

Degree: 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. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395

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):

Nakamura, Tetsu. “Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.” 2010. Thesis, Texas A&M University. Accessed July 19, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nakamura, Tetsu. “Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation.” 2010. Web. 19 Jul 2019.

Vancouver:

Nakamura T. Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nakamura T. Computational Analysis of Zel'dovich-von Neumann-Doering (ZND) Detonation. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-395

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cranfield University

16. Allum, J. A Study of the behaviour of emulsion explosives.

Degree: PhD, 2009, Cranfield University

URL: http://hdl.handle.net/1826/3976

► This study investigated the formulation and characterisation of emulsion explosives. This included the manufacture of more than 120kg of emulsion explosive of which around 105kg… (more)

▼ This study investigated the formulation and characterisation of emulsion explosives. This included the manufacture of more than 120kg of emulsion explosive of which around 105kg was used on the explosive ordnance range in over 350 individual firings. For each emulsion composition, an average of eight firings was undertaken with which to substantiate the explosive performance data. The formulation was varied to determine the effects of water content upon the physical characteristics of the emulsion. These physical effects included thermal conductivity, particle size, viscosity and the explosive performance of the emulsion. In respect of explosive performance, microballoons were added to sensitise the emulsion and the proportions of microballoons added were altered to look at their effect on velocity of detonation, sensitivity and the brisance of the emulsions. Emulsion explosives are commonly referred, in literature, as Type 11 non-ideal explosives. This is due to their non-linear behaviour with respect to the variation of velocity of detonation with density. Traditionally, when an emulsion explosive was commercially manufactured, the water content has been kept at a minimum (12-17%). This was accepted as the way to achieve the best explosive performance, based upon the belief that an emulsion with the highest concentration of active ingredients, ammonium nitrate and oil, would give the best explosive performance. This study examined a wider range of emulsion explosive water contents than has been previously studied, from 12% to 35% water. It was found, during this study, that higher water content emulsions, specifically 25% water, had a marked increase in explosive performance. The highest velocity of detonation recorded was in a 39mm diameter tube, at 25% water content with 3% microballoons, was 5558ms-1. This was some 15% higher than any other VOD recorded in this study. The high velocity of detonation, at 25% water content, was one of a number of physical characteristics in which this water content varied from the other emulsion water contents. This study endeavored to show that emulsion explosives could exhibit two differing types of explosive reaction, thermal explosion and grain burning. This was based on the velocity of detonation and plate dent data, both of which indicated that there was a change in reaction with water content. Emulsion explosives, with a high water and high microballoon content, exhibited a thermal explosion type reaction. They exhibited Type I ideal explosive behaviour, with increasing velocity of detonation with density. Lower water content emulsion explosives, displayed the more commonly expected Type 11 non-ideal behaviour and reacted in a grain burning type detonation.

Subjects/Keywords: Emulsion explosives; Explosive properties; Initiation; Detonation

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APA (6^th Edition):

Allum, J. (2009). A Study of the behaviour of emulsion explosives. (Doctoral Dissertation). Cranfield University. Retrieved from http://hdl.handle.net/1826/3976

Chicago Manual of Style (16^th Edition):

Allum, J. “A Study of the behaviour of emulsion explosives.” 2009. Doctoral Dissertation, Cranfield University. Accessed July 19, 2019. http://hdl.handle.net/1826/3976.

MLA Handbook (7^th Edition):

Allum, J. “A Study of the behaviour of emulsion explosives.” 2009. Web. 19 Jul 2019.

Vancouver:

Allum J. A Study of the behaviour of emulsion explosives. [Internet] [Doctoral dissertation]. Cranfield University; 2009. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/1826/3976.

Council of Science Editors:

Allum J. A Study of the behaviour of emulsion explosives. [Doctoral Dissertation]. Cranfield University; 2009. Available from: http://hdl.handle.net/1826/3976

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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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

Indian Institute of Science

19. Bhat, Abhishek R. Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE.

Degree: 2014, Indian Institute of Science

URL: http://hdl.handle.net/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.

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. (2014). Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/3181

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):

Bhat, Abhishek R. “Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE.” 2014. Thesis, Indian Institute of Science. Accessed July 19, 2019. http://hdl.handle.net/2005/3181.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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.” 2014. Web. 19 Jul 2019.

Vancouver:

Bhat AR. Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. [Internet] [Thesis]. Indian Institute of Science; 2014. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/2005/3181.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bhat AR. Experimental and Computational Studies on Deflagration-to-Detonation Transition and its Effect on the Performance of PDE. [Thesis]. Indian Institute of Science; 2014. Available from: http://hdl.handle.net/2005/3181

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McGill University

20. Gu, Lian Sheng. Effects of boundary conditions on the propagation of quasi-detonation waves.

Degree: M. Eng., Department of Mechanical Engineering., 1987, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile63863.pdf

Subjects/Keywords: Detonation waves; Combustion

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APA (6^th Edition):

Gu, L. S. (1987). Effects of boundary conditions on the propagation of quasi-detonation waves. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile63863.pdf

Chicago Manual of Style (16^th Edition):

Gu, Lian Sheng. “Effects of boundary conditions on the propagation of quasi-detonation waves.” 1987. Masters Thesis, McGill University. Accessed July 19, 2019. http://digitool.library.mcgill.ca/thesisfile63863.pdf.

MLA Handbook (7^th Edition):

Gu, Lian Sheng. “Effects of boundary conditions on the propagation of quasi-detonation waves.” 1987. Web. 19 Jul 2019.

Vancouver:

Gu LS. Effects of boundary conditions on the propagation of quasi-detonation waves. [Internet] [Masters thesis]. McGill University; 1987. [cited 2019 Jul 19]. Available from: http://digitool.library.mcgill.ca/thesisfile63863.pdf.

Council of Science Editors:

Gu LS. Effects of boundary conditions on the propagation of quasi-detonation waves. [Masters Thesis]. McGill University; 1987. Available from: http://digitool.library.mcgill.ca/thesisfile63863.pdf

Cranfield University

21. Allum, J. A study of the behaviour of emulsion explosives.

Degree: PhD, 2009, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/3976 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403675

► This study investigated the formulation and characterisation of emulsion explosives. This included the manufacture of more than 120kg of emulsion explosive of which around 105kg… (more)

▼ This study investigated the formulation and characterisation of emulsion explosives. This included the manufacture of more than 120kg of emulsion explosive of which around 105kg was used on the explosive ordnance range in over 350 individual firings. For each emulsion composition, an average of eight firings was undertaken with which to substantiate the explosive performance data. The formulation was varied to determine the effects of water content upon the physical characteristics of the emulsion. These physical effects included thermal conductivity, particle size, viscosity and the explosive performance of the emulsion. In respect of explosive performance, microballoons were added to sensitise the emulsion and the proportions of microballoons added were altered to look at their effect on velocity of detonation, sensitivity and the brisance of the emulsions. Emulsion explosives are commonly referred, in literature, as Type 11 non-ideal explosives. This is due to their non-linear behaviour with respect to the variation of velocity of detonation with density. Traditionally, when an emulsion explosive was commercially manufactured, the water content has been kept at a minimum (12-17%). This was accepted as the way to achieve the best explosive performance, based upon the belief that an emulsion with the highest concentration of active ingredients, ammonium nitrate and oil, would give the best explosive performance. This study examined a wider range of emulsion explosive water contents than has been previously studied, from 12% to 35% water. It was found, during this study, that higher water content emulsions, specifically 25% water, had a marked increase in explosive performance. The highest velocity of detonation recorded was in a 39mm diameter tube, at 25% water content with 3% microballoons, was 5558ms-1. This was some 15% higher than any other VOD recorded in this study. The high velocity of detonation, at 25% water content, was one of a number of physical characteristics in which this water content varied from the other emulsion water contents. This study endeavored to show that emulsion explosives could exhibit two differing types of explosive reaction, thermal explosion and grain burning. This was based on the velocity of detonation and plate dent data, both of which indicated that there was a change in reaction with water content. Emulsion explosives, with a high water and high microballoon content, exhibited a thermal explosion type reaction. They exhibited Type I ideal explosive behaviour, with increasing velocity of detonation with density. Lower water content emulsion explosives, displayed the more commonly expected Type 11 non-ideal behaviour and reacted in a grain burning type detonation.

Subjects/Keywords: 623.4527; Emulsion explosives; Explosive properties; Initiation; Detonation

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APA (6^th Edition):

Allum, J. (2009). A study of the behaviour of emulsion explosives. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/3976 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403675

Chicago Manual of Style (16^th Edition):

Allum, J. “A study of the behaviour of emulsion explosives.” 2009. Doctoral Dissertation, Cranfield University. Accessed July 19, 2019. http://dspace.lib.cranfield.ac.uk/handle/1826/3976 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403675.

MLA Handbook (7^th Edition):

Allum, J. “A study of the behaviour of emulsion explosives.” 2009. Web. 19 Jul 2019.

Vancouver:

Allum J. A study of the behaviour of emulsion explosives. [Internet] [Doctoral dissertation]. Cranfield University; 2009. [cited 2019 Jul 19]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/3976 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403675.

Council of Science Editors:

Allum J. A study of the behaviour of emulsion explosives. [Doctoral Dissertation]. Cranfield University; 2009. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/3976 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403675

University of Texas – Austin

22. Lee, Sangyup. Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.

Degree: 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. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/62166

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):

Lee, Sangyup. “Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.” 2017. Thesis, University of Texas – Austin. Accessed July 19, 2019. http://hdl.handle.net/2152/62166.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Sangyup. “Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics.” 2017. Web. 19 Jul 2019.

Vancouver:

Lee S. Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics. [Internet] [Thesis]. University of Texas – Austin; 2017. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/2152/62166.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee S. Nonholonomic Hamiltonian method for multiscale simulation of reacting shock physics. [Thesis]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/62166

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

23. 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 July 19, 2019. http://hdl.handle.net/2142/78705.

MLA Handbook (7^th Edition):

Clemenson, Michael. “Enhancing reactivity of aluminum-based structural energetic materials.” 2015. Web. 19 Jul 2019.

Vancouver:

Clemenson M. Enhancing reactivity of aluminum-based structural energetic materials. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2019 Jul 19]. 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

University of Illinois – Urbana-Champaign

24. 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 July 19, 2019. http://hdl.handle.net/2142/18646.

MLA Handbook (7^th Edition):

Taylor, Brian D. “Instability of steady and quasi-steady detonations.” 2011. Web. 19 Jul 2019.

Vancouver:

Taylor BD. Instability of steady and quasi-steady detonations. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2019 Jul 19]. 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

Colorado School of Mines

25. 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 July 19, 2019. 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. 19 Jul 2019.

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 2019 Jul 19]. 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 Washington

26. 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 July 19, 2019. 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. 19 Jul 2019.

Vancouver:

Washington MR. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. [Internet] [Thesis]. University of Washington; 2019. [cited 2019 Jul 19]. 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

27. Polley, Nolan Lee. Detonation Diffraction into a Confined Volume.

Degree: 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, C?H?+ 2.5 O?, C?H?+ 4 O?, C?H?+ 3 O? and H?+ 0.5 O?, 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…

10 more images…

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APA (6^th Edition):

Polley, N. L. (2012). Detonation Diffraction into a Confined Volume. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714

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):

Polley, Nolan Lee. “Detonation Diffraction into a Confined Volume.” 2012. Thesis, Texas A&M University. Accessed July 19, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Polley, Nolan Lee. “Detonation Diffraction into a Confined Volume.” 2012. Web. 19 Jul 2019.

Vancouver:

Polley NL. Detonation Diffraction into a Confined Volume. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Polley NL. Detonation Diffraction into a Confined Volume. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8714

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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: http://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, leaf iii.

Subjects/Keywords: Detonation tube; Pulsed detonation engine; Aerospace Engineering

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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 http://scholarsmine.mst.edu/masters_theses/3735

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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 July 19, 2019. http://scholarsmine.mst.edu/masters_theses/3735.

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MLA Handbook (7^th Edition):

Gross, Jeffrey Thomas. “Thrust, pressure, and wave speed measurements of detonations, and skin friction analysis of detonation tubes.” Web. 19 Jul 2019.

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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 2019 Jul 19]. Available from: http://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: http://scholarsmine.mst.edu/masters_theses/3735

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No year of publication.

29. Driscoll, Robert B. EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2013, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113995

► An experimental investigation was carried out to study the travel of a shockwave through a crossover tube and analyze the ability to cause shock initiated… (more)

▼ An experimental investigation was carried out to study the travel of a shockwave through a crossover tube and analyze the ability to cause shock initiated detonation. This concept involved using a pulse detonation engine (PDE) as a driver to produce a shockwave. This shockwave travelled to a second, adjacent detonation tube. In this driven PDE, the shockwave would reflect off of the inner, concaved wall causing shock initiated detonation.A preliminary study using a dual PDE crossover tube system yielded experimental results that have shown successful cases where reflected shockwaves are used to cause direct detonation initiation. For that study, two reactant-filled PDEs were connected through an air-filled crossover tube, with the driver PDE ignited. High speed pressure sensors were used to verify combustion wave speeds. Preliminary results showed shock initiated detonation to be possible when using a dual PDE crossover system.Additionally, a parametric study was carried out to investigate shock initiated detonation within a dual PDE crossover system. Shockwaves produced by a driver PDE were carried through crossover tubes of varying lengths and bends to the driven PDE. The driving PDE was ignited using a traditional spark plug. From burning wave speeds measured by high speed pressure sensors, results have shown a transferred shockwave reflecting off the wall of the driven PDE will achieve shock initiated detonation. However, the results have also yielded cases where the initial shockwave reflection does not directly initiate a detonation in the driven PDE, but rather causes ignition leading to accelerated deflagration to detonation transition (DDT). Overall results have shown that for specific tube geometries, there is a maximum effective crossover tube length in which shock initiated detonation is possible.Furthermore, shadowgraph techniques were used to capture and study the propagation of a transferred shockwave produced by a driving detonation tube. To accomplish this, a single PDE was used to drive a shockwave through a clear, composite, transfer tube. Shock attenuation data was gathered during this study. This information created a relation between shock strength and crossover tube length. Also, regardless of the filling conditions of the transfer tube, all shock waves reach similar attenuation rates at relatively the same transfer tube length.Moreover, a vortex plume study was carried out to capture and study shock Mach number decay as a planar shockwave transitions to a spherical shockwave at the exit of a transfer tube. Transfer tubes of varying lengths and bends were used in the study. General Attenuation Law was used to further understand the relation between spherical shock strength and propagation distance. Results showed that a bend placed at the end of the transfer tube enhances the strength of a planar shockwave.Finally, with the aid of the two shadowgraph experiments, a correlation between maximum effective crossover tube length and shock strength was created. Performance in the driven PDE begins… Advisors/Committee Members: Gutmark, Ephraim (Committee Chair).

Subjects/Keywords: Aerospace Materials; Pulse Detonation Engine; Detonation; Crossover

…1 1.1 The Pulse Detonation Engine… …6 1.2.2 Zeldovich-von Neumann-Doring (ZND) Detonation Theory… …8 1.2.3 Thermodynamic Analysis of a Detonation Cycle… …15 1.3.2 Critical Detonation Parameters… …18 1.4 Detonation Initiation…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Driscoll, R. B. (2013). EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113995

Chicago Manual of Style (16^th Edition):

Driscoll, Robert B. “EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM.” 2013. Masters Thesis, University of Cincinnati. Accessed July 19, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113995.

MLA Handbook (7^th Edition):

Driscoll, Robert B. “EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM.” 2013. Web. 19 Jul 2019.

Vancouver:

Driscoll RB. EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM. [Internet] [Masters thesis]. University of Cincinnati; 2013. [cited 2019 Jul 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113995.

Council of Science Editors:

Driscoll RB. EXPERIMENTAL INVESTIGATION OF SHOCK TRANSFER AND SHOCK INITIATED DETONATION IN A DUAL PULSE DETONATION ENGINE CROSSOVER SYSTEM. [Masters Thesis]. University of Cincinnati; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113995

Georgia Tech

30. Redd, Evan M. Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution.

Degree: PhD, Mechanical Engineering, 2017, Georgia Tech

URL: http://hdl.handle.net/1853/59282

► An orphaned nuclear detonation in an urban environment would create enormous pressure on policy makers to act quickly requiring strong attribution evidence. To answer these… (more)

Subjects/Keywords: Nuclear forensics; Post-detonation nuclear forensics; Peri-detonation nuclear forensics; Attribution; Sensitivity analysis; Monte Carlo Filtering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Redd, E. M. (2017). Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59282

Chicago Manual of Style (16^th Edition):

Redd, Evan M. “Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution.” 2017. Doctoral Dissertation, Georgia Tech. Accessed July 19, 2019. http://hdl.handle.net/1853/59282.

MLA Handbook (7^th Edition):

Redd, Evan M. “Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution.” 2017. Web. 19 Jul 2019.

Vancouver:

Redd EM. Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2019 Jul 19]. Available from: http://hdl.handle.net/1853/59282.

Council of Science Editors:

Redd EM. Sensitivity analysis and parameterization of passively measured prompt-diagnostic signatures from a nuclear detonation and the effects on early-time attribution. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59282

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