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Author : Michael John Gifford
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book The role of hot-spots in the ignition and growth of explosion written by Michael John Gifford and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank Philip Bowden
Publisher : CUP Archive
ISBN 13 : 9780521312332
Total Pages : 132 pages
Book Rating : 4.3/5 (123 download)
Download or read book Initiation and Growth of Explosion in Liquids and Solids written by Frank Philip Bowden and published by CUP Archive. This book was released on 1985-10-24 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the research of Bowden, Yoffe and their collaborators on explosive initiation. What Bowden and Yoffe showed was that explosives are ignited almost invariably by thermal processes and though other processes have been identified their work still holds.
Download or read book A Statistical Hot Spot Reactive Flow Model for Shock Initiation and Detonation of Solid High Explosives written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A statistical hot spot reactive flow model for shock initiation and detonation of solid high explosives developed in the ALE3D hydrodynamic computer code is presented. This model is intended to evolve into a physically correct description of the physical and chemical mechanisms that control the onset of shock initiation via hotspot formation, the growth (01 failure to grow) of these hotspots into the surrounding explosive particles, the rapid transition to detonation, and self-sustaining detonation. Mesoscale modeling of the shock compression and temperature dependent chemical decomposition of individual explosive particles are currently yielding accurate predictions of hot spot formation and the subsequent growth (or failure) of these hotspot reactions in the surrounding grains. For two- and three-dimensional simulations of larger scale explosive charges, a statistical hotspot model that averages over thousands of individual hotspot dimensions and temperatures and then allows exothermic chemical reactions to grow (or fail to grow) due to thermal conduction is required. This paper outlines a first approach to constructing a probabilistic hot spot formulation based on the number density of potential hotspot sites. These hotspots can then either ignite or die out if they do not exceed certain ignition criteria, which are based on physical properties of the explosive particles. The growing hot spots spread at burn velocities given by experimentally determined deflagration velocity versus pressure relationships. The mathematics and assumptions involved in formulating the model and practical examples of its usefulness are given.
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (727 download)
Download or read book Statistical Hot Spot Model for Explosive Detonation written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Non-local Thermodynamic Equilibrium Statistical Hot Spot Model (NLTE SHS), a new model for explosive detonation, is described. In this model, the formation, ignition, propagation, and extinction of hot spots is explicitly modeled. The equation of state of the explosive mixture is treated with a non-local equilibrium thermodynamic assumption. A methodology for developing the parameters for the model is discussed, and applied to the detonation velocity diameter effect. Examination of these results indicates where future improvements to the model can be made.
Author : Claude-Michel Brauner
Publisher : Springer Science & Business Media
ISBN 13 : 9400927703
Total Pages : 582 pages
Book Rating : 4.4/5 (9 download)
Download or read book Mathematical Modeling in Combustion and Related Topics written by Claude-Michel Brauner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains invited lectures and contributed papers presented at the NATO Advanced Research Workshop on Mathematical Modeling in Combustion and related topics, held in. Lyon (France), April 27 - 30, 1987. This conference was planned to fit in with the two-month visit of Professor G.S.S. Ludford to the Ecole Centrale de Lyon. He kindly agreed to chair the Scientific and Organizing Committee and actively helped to initiate the meeting. His death in December 1986 is an enormous loss to the scientific community in general, and in particular, to the people involved in the present enterprise. The subject of mathematical modeling in combustion is too large for a single conference, and the selection of topics re flects both areas of recent research activity and areas of in terest to Professor G.S.S. Ludford, to whose memory the Advanced Workshop and this present volume are dedicated. The meeting was divided into seven specialized sessions detonation theory, mathematical analysis, numerical treatment of combustion problems, flame theory, experimental and industrial aspects, complex chemistry, and turbulent combustion. It brought together researchers and engineers from University and Industry (see below the closing remarks of the workshop by Prof. N. Peters). The articles in this volume have been judged and accepted on their scientific quality, and language corrections may have been sacrificed in order to allow quick dissemination of knowledge to prevail.
Author : A. L. Nichols III
Publisher :
ISBN 13 :
Total Pages : 27 pages
Book Rating : 4.:/5 (316 download)
Download or read book Statistical Hot Spot Model for Explosive Detonation written by A. L. Nichols III and published by . This book was released on 2004 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Non-local Thermodynamic Equilibrium Statistical Hot Spot Model (NLTE SHS), a new model for explosive detonation, is described. In this model, the formation, ignition, propagation, and extinction of hot spots is explicitly modeled. The equation of state of the explosive mixture is treated with a nonlocal equilibrium thermodynamic assumption. A methodology for developing the parameters for the model is discussed, and applied to the detonation velocity diameter effect. Examination of these results indicates where future improvements to the model can be made.
Author : F P. Bowden
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Hot spots and the initiation of explosion written by F P. Bowden and published by . This book was released on 1949 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles L. Mader
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Hydrodynamic Hot Spot and Shock Initiation of Homogeneous Explosives written by Charles L. Mader and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Federal Aviation Administration (FAA)/Aviation Supplies & Academics (ASA)
Publisher : Aviation Supplies & Academics
ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.:/5 (327 download)
Download or read book Aviation Maintenance Technician Handbook-Powerplant written by Federal Aviation Administration (FAA)/Aviation Supplies & Academics (ASA) and published by Aviation Supplies & Academics. This book was released on 2012 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new FAA AMT Handbook--Powerplant (Volume 1 and 2) replaces and supersedes Advisory Circular (AC) 65-12A. Completely revised and updated, this handbook reflects current operating procedures, regulations, and equipment. This book was developed as part of a series of handbooks for persons preparing for mechanic certification with airframe or powerplant ratings, or both -- those seeking an Aviation Maintenance Technician (AMT) Certificate, also called an A&P license. An effective text for both students and instructors, this handbook will also serve as an invaluable reference guide for current technicians who wish to improve their knowledge. Powerplant Volume 1: Aircraft Engines, Engine Fuel and Fuel Metering Systems, Induction and Exhaust Systems, Engine Ignition and Electrical Systems, Engine Starting Systems Powerplant Volume 2: Lubrication and Cooling Systems, Propellers, Engine Removal and Replacement, Engine Fire Protection Systems, Engine Maintenance and Operation, Light-Sport Aircraft Engines Includes colored charts, tables, full-color illustrations and photographs throughout, and an extensive glossary and index.
Author : S.N. Bulusu
Publisher : Springer Science & Business Media
ISBN 13 : 9780792307457
Total Pages : 794 pages
Book Rating : 4.3/5 (74 download)
Download or read book Chemistry and Physics of Energetic Materials written by S.N. Bulusu and published by Springer Science & Business Media. This book was released on 1990 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute on Chemistry and Physics of the Molecular Processes in Energetic Materials, Altavilla Milicia, Sicily, Italy, September 3-15, 1989
Author :
Publisher :
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Huahua Xiao
Publisher : Springer
ISBN 13 : 3662483793
Total Pages : 162 pages
Book Rating : 4.6/5 (624 download)
Download or read book Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts written by Huahua Xiao and published by Springer. This book was released on 2015-11-03 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis offers important new insights into and a deeper understanding of premixed flame instabilities and hydrogen safety. Further, it explains the underlying mechanisms that control the combustion processes in tubes. The author’s previous scientific accomplishments, which include a series of high-quality publications in the best journals in our field, Combustion and Flame and International Journal of Heat and Mass Transfer, are very impressive and have already made a significant contribution to combustion science.
Author :
Publisher : AIAA
ISBN 13 : 9781600863875
Total Pages : 422 pages
Book Rating : 4.8/5 (638 download)
Download or read book Dynamics of Detonations and Explosions written by and published by AIAA. This book was released on 1991 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Advisory Committee for Aeronautics
Publisher :
ISBN 13 :
Total Pages : 1464 pages
Book Rating : 4.:/5 (31 download)
Download or read book Annual Report of the National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1950 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lloyd's Register Foundation
Publisher : Lloyd's Register
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4./5 ( download)
Download or read book Lloyd’s Register Technical Association 1985-1986 written by Lloyd's Register Foundation and published by Lloyd's Register . This book was released on 1985-01-01 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lloyd’s Register Technical Association (LRTA) was established in 1920 with the primary objective of sharing technical expertise and knowledge within Lloyd’s Register. Publications have consistently been released on a yearly basis, with a brief interruption between 1938 and 1946. These publications serve as a key reference point for best practices and were initially reserved for internal use to maximise LR’s competitive advantage. Today, the LRTA takes a fresh approach, focusing on collaboration by combining professional expertise from across LRF & Group to ensure a frequent output of fresh perspectives and relevant content. The LRTA has evolved into a Group-wide initiative that identifies, captures, and shares knowledge spanning various business streams and functions. To support this modern approach, the LRTA has adopted a new structure featuring representatives and senior governance across the business streams and the LR Foundation. The Lloyd's Register Technical Association Papers should be seen as historical documents representing earlier viewpoints and are not reflective of current thinking and perspectives by the current LR Technical Association.
Author : Stuart Davis Herring
Publisher :
ISBN 13 : 9781124315768
Total Pages : pages
Book Rating : 4.3/5 (157 download)
Download or read book Dependence of Hotspot Initiation on Void Distribution in High Explosive Crystals Simulated with Molecular Dynamics written by Stuart Davis Herring and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscopic defects may dramatically affect the susceptibility of high explosives to shock initiation. Such defects redirect the shock's energy and become hotspots (concentrations of stress and heat) that can initiate chemical reactions. Sufficiently large or numerous defects may produce a self-sustaining deflagration or even detonation from a shock notably too weak to detonate defect-free samples. The effects of circular or spherical voids on the shock sensitivity of a model (two- or three-dimensional) high explosive crystal are considered. We simulate a piston impact using molecular dynamics with a Reactive Empirical Bond Order (REBO) model potential for a sub-micron, sub-ns exothermic reaction in a diatomic molecular solid. In both dimensionalities, the probability of initiating chemical reactions rises more suddenly with increasing piston velocity for larger voids that collapse more deterministically. A void of even 10 nm radius (~39 interatomic spacings) reduces the minimum initiating velocity by a factor of 4 (8 in 3D). The transition at larger velocities to detonation is studied in micron-long samples with a single void (and its periodic images). Reactions during the shock traversal increase rapidly with velocity, then become a reliable detonation. In 2D, a void of radius 2.5 nm reduces the critical velocity by 10% from the perfect crystal; a Pop plot of the detonation delays at higher velocities shows a characteristic pressure dependence. 3D samples are more likely to react but less to detonate. In square lattices of voids, reducing the (common) void radius or increasing the porosity without changing the other parameter causes the hotspots to consume the material faster and detonation to occur sooner and at lower velocities. Early behavior is seen to follow a very simple ignition and growth model; the pressure exponents are more realistic than with single voids. The hotspots collectively develop a broad pressure wave (a sonic, diffuse deflagration front) that triggers detonation when it reaches the lead shock. Reaction yields from triangular lattices are insignificantly different. Random void arrangements delay detonation by 15.5% but introduce a standard deviation of just 5.1%.
Author : Satyanad Kichenassamy
Publisher : Springer Science & Business Media
ISBN 13 : 0817643524
Total Pages : 296 pages
Book Rating : 4.8/5 (176 download)
Download or read book Fuchsian Reduction written by Satyanad Kichenassamy and published by Springer Science & Business Media. This book was released on 2007-09-18 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-part text beautifully interweaves theory and applications in Fuchsian Reduction. Background results in weighted Sobolev and Holder spaces as well as Nash-Moser implicit function theorem are provided. Most chapters contain a problem section and notes with references to the literature. This volume can be used as a text in graduate courses in PDEs and/or Algebra, or as a resource for researchers working with applications to Fuchsian Reduction. The comprehensive approach features the inclusion of problems and bibliographic notes.
