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Sunday, May 10, 2020 | History

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

deflagration-to-detonation transition project

Sandia Laboratories. Initiating and Pyrotechnic Components Division 2515

deflagration-to-detonation transition project

by Sandia Laboratories. Initiating and Pyrotechnic Components Division 2515

  • 296 Want to read
  • 10 Currently reading

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
    ContributionsLieberman, M. L., United States. Dept. of Energy, Sandia Laboratories
    The Physical Object
    Paginationv. :
    ID Numbers
    Open LibraryOL14883488M

    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.


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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. The 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 decades 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 the 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.

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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 .