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2 edition of deflagration-to-detonation transition project found in the catalog.

deflagration-to-detonation transition project

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Published by Dept. of Energy, [Office of the Assistant Secretary for Defense Programs], Sandia Laboratories in Albuquerque, N.M .
Written in English

    Subjects:
  • Detonators.

  • Edition Notes

    StatementM. L. Lieberman, editor, Initiating and Pyrotechnic Compounents Division 2515, Sandia Laboratories ; prepared by Sandia Laboratories for the United States Department of Energy under contract DE-AC04-76DP00789.
    SeriesSAND ; 79-1267, SAND (Series) (Albuquerque, N.M.) -- 79-1267.
    ContributionsLieberman, M. L., United States. Dept. of Energy., Sandia Laboratories.
    The Physical Object
    Paginationv. :
    ID Numbers
    Open LibraryOL15237109M

    Flame acceleration and deflagration to detonation transition in nuclear safety. state-of-the-art report by a group of experts. Technical Report NEA/CSNI/R()7, OECD Nuclear Energy Agency, August See my SOAR website for individual chapters. Available from the OECD as a single pdf file. 53 S. Browne, Z. Liang, and J. E. Shepherd. Under his leadership, his team has developed advanced EM models in LLNL's multi-physics hydrocode ALE3D: HERMES (High Explosive Reaction Mechanical Stimulus) model to assess non-shock ignition, deflagration, and DDT (deflagration-to-detonation transition); Mesoscale modeling to understand structure-property-performance relationships in shock. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.


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deflagration-to-detonation transition project by Sandia Laboratories. Initiating and Pyrotechnic Components Division 2515. Download PDF EPUB FB2

Get this from a library. Deflagration-to-detonation transition project book deflagration-to-detonation transition project.

[M L Lieberman; Sandia Laboratories. Initiating and Pyrotechnic Components Division ; United States. Department of Energy.; Sandia Laboratories.]. Deflagration to Detonation Transition In some situations, a subsonic flame may accelerate into a supersonic flame.

This deflagration to detonation is difficult to predict but occurs most often when eddy currents or other turbulence are present in the flames. Introduction. Deflagration-to-detonation transition (DDT) is one of the major challenges of the combustion theory.

After deflagration-to-detonation transition project book of both experimental and numerical studies, the physical processes involved in the mechanism of the DDT phenomenon and the mechanism by which a deflagration transforms into a detonation are still poorly understood and remain one of the major unresolved Cited by:   Deflagration venting is an explosion protection measure that involves deflagration-to-detonation transition project book provision of a predesigned escape route (called an explosion vent) for the release of the pressure and flame generated during an explosion quickly enough to prevent a dangerous build up of pressure within the vessel, pipes and ducts, or building that is being protected.

As discussed in Pekalski, Zevenbergen, Lemkowitz. Among the geometries associated with fast flame acceleration and the deflagration-to-detonation transition (DDT) scenarios, [1][2][3][4] [5] [6][7][8][9] obstructed cylindrical tubes provide.

The paper presents experimental, theoretical, and numerical studies of deflagration-to-detonation transition (DDT) in highly reactive hydrogen–oxygen and ethylene–oxygen mixtures. Talk:Deflagration to detonation transition. Jump to navigation Jump to search.

This is the talk page for discussing improvements to the Deflagration to detonation transition article. This is not a forum for general discussion of the article's subject.

Put new text under old text. please visit the project page. My name is Eric and I am working on valveless pulse detonation engine for my final year project.

I am trying to simulate the deflagration - to - detonation transition process with FLUENT. The model is a 2D, axisymmetric tube with one close end and the other end is set to ambient condition. A project has been initiated to address deflagration-to-detonation (DDT) transition as it applies to low voltage detonators.

Studies with the relatively new DDT explosive CP are underway in the areas of physics of DDT, compatibility, and component development. See Deflagration to detonation transition Latest News, Photos, Biography, Videos and Wallpapers. Deflagration to detonation transition profile on Times of India Read " Deflagration to detonation Transition Behavior of Aluminized HMX" on DeepDyve - Instant access to the journals you need.

Kenneth J. Scribner, 2 books Institute of Petroleum (Great Deflagration-to-detonation transition project book, 1 book Anthony Gorman Benedict, 1 book Roy Llewellyn Grant, 1 book Clarence Hall, 1 book Ragnar Benson, 1 book Peter Voss, 1 book CIA, 1 book Frankfort Arsenal, 1 book Mound Facility.

Information Services, 1 book J. Michael McGlaun, 1 book J. Michael McGlaun, 1 book Sandia. A standard CP detonator design has been used to study a variety of design parameters including test temperature, closure disk thicknes, powder column diameter, transition column diameter, powder column confinement, igniter charge holder material, bridgewire diameter, fire pulse energy, fire pulse.

Pulse detonation engines (PDEs) are new exciting propulsion technologies for future propulsion applications. The operating cycles of PDE consist of fuel-air mixture, combustion, blowdown, and purging.

The combustion process in pulse detonation engine is the most important phenomenon as it produces reliable and repeatable detonation waves. The detonation wave initiation in detonation tube in Cited by: While there has been some recognition regarding the impact of thermal boundary conditions (adiabatic versus isothermal) on premixed flame propagation mechanisms in micro-channels (hydraulic diameters <10 mm), their impact in macro-channels has often been overlooked due to small surface-area-to-volume ratios of the propagating combustion wave.

Further, the impact of radiative losses has also Author: Gautham Krishnamoorthy, Lucky Nteke Mulenga. Deflagration to detonation transition (DDT) has been observed for 91/ 9 RDX/Wax over the range of 67 - 95% TMD. The initial process monitored was the propagation of a convective flame front through the porous charge.

Some time after that a postconvective front was formed; it traveled at a greater speed and overtook the convective front. A pulse detonation engine (PDE) is a type of propulsion system that uses detonation waves to combust the fuel and oxidizer mixture.

The engine is pulsed because the mixture must be renewed in the combustion chamber between each detonation wave and the next. Theoretically, a PDE can operate from subsonic up to a hypersonic flight speed of roughly Mach 5.

An ideal PDE design can have a. The Shchelkin spiral is a device that assists the transition from deflagration (subsonic combustion) to detonation in a pulse detonation spiral is named after Kirill Ivanovich Shchelkin, a Russian physicist who described it in his book Gas Dynamics of Combustion.

In pulse detonation engines, direct detonation of the combustible mixture can be relatively straightforward, but. Designed for chemical engineers and other technical personnel involved in the design, operation, and maintenance of facilities and equipment where deflagration and detonation flame arresters (DDFAs) may be required, this book fosters effective application and operation of DDFAs through treatment of their principles of operation, selection Author: Stanley S.

Grossel. The present numerical investigation aims to study the dynamics of deflagration-to-detonation transition (DDT) in inhomogeneous and homogeneous mixtures. Modeling discontinuities, such as shocks and contact surfaces, in high-speed compressible flows require numerical schemes that can capture these features while avoiding spurious : R KhodadadiAzadboni, J Wen, A Heidari, S Muppala, C Wang.

The first part of this book is available in "Fundamentals of Hydrogen Safety Engineering, I. This is the first state-of-the-art book on hydrogen safety engineering. The author Prof Vladimir Molkov is an expert in this emerging discipline, leading the HySAFER Centre at the University of Ulster.3/5(16).

The deflagration to detonation transition (DDT) is believed to occur at just these densities and consequently they are the densities important for studying the properties of the subsequent detonation.

In conclusion, this work reviews the status of DNS studies of detonations and their possible implications for Type Ia supernova models.

inside the reflector, deflagration-to-detonation transition (DDT), deflagration initiation outside the reflector, and no combustion. Additionally, for low-nitrogen dilutions, the direct initiation of detonations and deflagrations near the Mylar diaphragm was observed to occur.

Conditional Modifiers. Click on any conditional modifier title to see a full description. Learn about when to use and when not to use conditional modifiers. List of Conditional Modifiers: Probability of a hazardous atmosphere; Probability of ignition inside process equipment; Probability of.

An important technical challenge remains the ability to achieve consistent, repetitive detonations in a short distance. The direct initiation of detonation requires an inordinate amount of energy while a deflagration-to-detonation transition (DDT) occurs at lower energies but requires excessive length for aerospace propulsion applications.

Abstract. In this paper the Deflagration to Detonation Transition (DDT) process of gaseous H 2-O 2 mixture and Mach reflection of gaseous detonation wave on a wedge have been conducted experimentally. The cellular pattern of DDT process and Mach reflection were obtained from experiments with wedge angle я= 10° ̃ 40° and initial pressure of gaseous mixture 16kPa ̃ : D.

Zhang, C. Guo. Conference papers. Conference presentations: R. Khodadadi Azadboni, J.X. Wen, A. Heidari, & L.R. Boeck, "Numerical Study of Deflagration-to-Detonation Transition in Homogenous and Inhomogeneous Hydrogen-Air Mixtures", The 26th ICDERS, Boston, USA, 30 July - 4 August ; R.

Khodadadi Azadboni, A. Heidari, J.X. Wen, "CFD Analysis of Deflagration to Detonation Transition in. Most of the material covered in this book deals with the fundamentals of chemistry and physics of key processes and fundamental mechanisms for various combustion and combustion-related phenomena in gaseous combustible mixture.

It provides the reader with basic knowledge of burning processes and mechanisms of reaction wave propagation. This book introduces the detonation phenomenon in explosives.

It is ideal for engineers and graduate students with a background in thermodynamics and fluid mechanics. The material is mostly qualitative aiming to illustrate the physical aspects of the phenomenon.

Classical idealized theories of detonation waves are presented first. “Deflagration-to-Detonation (DDT) Transition Behavior of Hydrocarbon Fuels with Oxygen in Micro-Gaps” Makayla Ianuzzi and Dillon Over “Flow and Ignition Visualization and Characterization Using Shadowgraphy, Schlieren, and High-Speed Cinematography” Jarrett.

Chief Project Engineer for Controllable Solid Rocket Motor R&D (–) As principal investigator, directed the R&D of a Class high strain low deflagration to detonation transition (DDT) high energy nitrate ester plasticized polyethylene glycol alternate propellant for the Trident I C-4 missile BOOK PUBLISHED BY THE UNIVERSITY.

Complemented by an estimating tool spreadsheet based on a fixed set of chemicals to assist in risk estimations, Probability of Ignition of a Released Flammable Mass converts a best guess to a calculated value based on available information and current technology. The text documents and explains the science and background of the technology-based approach.

This solver represents an addition to the open-source CFD package OpenFOAM. The solver is used to simulate the deflagration-to-detonation transition in hydrogen-air mixtures. Prominent features are described below. Additional description is available in the pdf file included.

The project, a partnership of eight European companies, was undertaken from to The DARTS project received the financial support of the European Communities and Sustainable Growth Program (GROWTH ). SAFET SafeT is a thematic network on tunnels that was started in May and finished in April   The misunderstanding of the Deflagration-to-Detonation Transition (DDT) mechanism and how its incorporation with previous practicalities will enable a better understanding of type la supernovae are some of the main ideas contained in the article.

Strengths and Weaknesses of the Article. Propellants & Combustion 2 days 1 instructor deflagration-to-detonation transition (DDT), propagation physics, experimental methods, became a Technical Staff Member at Los Alamos and then a Project Leader.

In he was a visiting scientist at Penn State University, and in he accepted a tenured faculty position at. Deflagration to Detonation Transition in Unconfined VCEs.

Written by: Adrian Pierorazio, Kelly Thomas, Martin Goodrich Published in: (AIChE) American Institute of Chemical Engineers - Spring Annual Meeting Date: April Deflagrations by Design. Written by: Darren Malik, Jihui Geng, Kelly Thomas, Brad Horn, Oscar Rodriguez. A current project involving Profs.

Frank Lu and Luca Massa with M.S. student Hari Nagarajan is aimed at exploring the interaction between shock and detonation waves with homogenous isotropic turbulence (HIT) using direct numerical simulation (DNS). My interested in explosives started with the book in my school library when I was in the fourth grade, entitled “A Boy’s Book of Explosives”, targetted to year old boys.

Deflagration to Detonation Transition in Unconfined VCEs; Dust Explosion Case History; Effective Application of QRA to Hydrogen Fueling Operations; Explosion Risk and Structural Damage Assessment Code (ERASDAC) Update of CCPS Book – Guidelines to Vapor Cloud Explosion, Pressure Vessel Burst, BLEVE and Flash Fire Hazards.

REEF3D is an open-source computational fluid dynamics program. With a strong focus on hydraulic, coastal, offshore and environmental engineering, as well as Marine CFD, the use of the level-set method enables it to calculate complex free surface model is implemented in highly modular C++ and the source code is available under the GPL license.

The 11 extensive chapters in this volume are: Context and Complexity of Non-Shock Initiation (B. W. Asay), Transport Phenomena for Non-Shock Initiation Processes (L. Perry), The Chemical Kinetics of Solid Thermal Explosions (B. F. Henson), Classical Theory of Thermal Criticality (L. G. Hill), Deflagration Phenomena in Energetic Materials (S.

I.Propose a Project ; Toggle Tools menu visibility Tools Deflagration to Detonation Transition (DDT) The transition phenomenon resulting from the acceleration of a deflagration flame to detonation via flame-generated turbulent flow and compressive heating effects.

At the instant of transition a volume of pre-compressed, turbulent gas ahead of. The main objective of this work is to comprehensively provide a fundamental understanding of the entire process of the flame-pressure wave interactions with end-gas autoignition and detonation development in a confined chamber by two-dimensional numerical simulations with a stoichiometric hydrogen/air by: 2.