Download or read book Three Dimensional Unsteady Reactive Two Phase Flow Analysis to Predict Detonation Transition in Fragmented High Explosives Warheads written by Herman Krier and published by . This book was released on 1985 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prior to fuse initiation, metal containment wall failure and fragmentation of the high explosive can result from the impact forces between the warhead and the hardened target. The detonation that is expected to occur under totally confined conditions may be reduced to an unsteady, rapid deflagration with much less damage to the target. The principal work presented in the report is the development of a three-dimensional unsteady flow model which can be used to predict whether detonation will occur after the impact of a ruptured warhead filled with fragmented high explosive. The delay of detonation transition can be quite significant if there is sufficient mass loss through container walls. This is clearly demonstrated here, where significant detonation delays could be predicted when using even a quasi, one-dimensional assumption. This report includes significant new findings and is the culmination of more than two years of effort to solve the two- and three-dimensional flow in a reactive gas/solid mixture. The results demonstrate that it may be possible to predict whether a warhead with case failure (and filled with fragmented high explosive) will produce a low order detonation which is weaker than one required to damage structures. A major portion of the report deals with the numerical methods required in order to carry out such solutions. Results include not only pressure histories but flow velocities, reaction from loci, and temperature distributions.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book A Fully Viscous Two Dimensional Unsteady Flow Analysis Applied to Detonation Transition in Porous Explosives written by Herman Krier and published by . This book was released on 1985 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes significant new progress towards solving the two-dimensional fully viscous unsteady flow in a reactive solid/gas mixture. The results demonstrate that it may be possible to predict whether a warhead with case failure (and filled with fragmented high explosive) will produce a low order detonation which is weaker than the one required to damage a structure. The loss of mass, momentum, and energy though a warhead case opening is a multi- dimensional problem even through the reaction front may progress axially through the damaged explosive. Mass is ejected in a basically radial direction and necessitates a multi-dimensional problem formulation in order to model the deflagration to detonation transition event accurately enough to make meaningful predictions. The appropriate equations of state and continuity equations are formulated and are solved by a finite differencing scheme. Run-up length to detonation in the fragmented explosive bed from a case opening through which mass is ejected should be married with a model of probabilistic case failure on impact to predict warhead lethality.
Download or read book Detonation and Two Phase Flow written by S Penner and published by Elsevier. This book was released on 2012-12-02 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Astronautics and Rocketry, Volume 6: Detonation and Two-Phase Flow compiles technical papers presented at the ARS Propellants, Combustion, and Liquid Rockets Conference held in Palm Beach, Florida on April 26-28, 1961. This book provides an excellent illustration of research and development on a selected group of problems relating to detonations, two-phase nozzle flow, and combustion in liquid fuel rocket engines. This volume is divided into two parts. Part 1 covers the entire range of physical conditions under which detonation may be initiated or sustained, such as high explosives, solid propellants, liquid sprays, and gases. Experimental and theoretical studies are also discussed, including the significant progress of the basic phenomena involved in transition from deflagration to detonation, and nature of stable detonations in dilute sprays and other systems. The perennial problems associated with high frequency instabilities in liquid fuel rocket engines are considered in Part 2. This publication is valuable to students and investigators working in the field of propulsion research and development.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Documents Center Index written by University of Illinois at Urbana-Champaign. Engineering Documents Center and published by . This book was released on 1985 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1986 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamics of Explosion written by V. K. Kedrinskiĭ and published by Springer Science & Business Media. This book was released on 2005-07-22 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRELIMINARY TEXT: The book includes results of experimental studies and mathematical models of wide class of nonstationary processes developing in liquid under pulse (explosive) loading. The author addresses engineers and scientists from scientific computation. Experimental results on structure and parameters of wave fields generated by explosions of cord and spiral charges, description of formation mechanisms of high speed cumulative flows at underwater explosions near free surface as well as studies on dynamics of spherical, cylindrical and ring cavities are presented. The features of shock wave transformation in bubbly liquids, their amplification as a result of collision and focusing, bubbly detonation wave formation in reactive bubbly liquids are in detail analyzed. The results of studies of real liquid microstructure as two-phase medium, bubbly cavitation development, rarefaction waves in real liquids, notion of their strength, relaxation of tensile stresses and process of liquid fructure under pulse (explosive) loading are discussed in detail.
Download or read book The Interaction of Non nuclear Munitions with Structures written by and published by . This book was released on 1983 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detonation and Two phase Flow written by American Rocket Society and published by . This book was released on 1962 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Two Phase Flow and Heat Transfer written by Sadik Kakaç and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past two decades, two-phase flow and heat transfer problems associated with two-phase phenomena have been a challenge to many investigators. Two-phase flow applications are found in a wide range of engineering systems, such as nuclear and conventional power plants, evaporators of refrigeration systems and a wide vari ety of evaporative and condensive heat exchangers in the chemical industry. This publication is based on the invited lectures presented at the NATO Advanced Research Workshop on the Advances in Two-Phase Flow and Heat Transfer. The Horkshop was attended by more than 50 leading scientists and practicing engineers who work actively on two-phase flow and heat transfer research and applications in dif ferent sectors (academia, government, industry) of member countries of NATO. Some scientific leaders and experts on the subject matter from the non-NATO countries were also invited. They convened to discuss the state-of-the-art in two-phase flow and heat transfer and formulated recommendations for future research directions. To achieve these goals, invited key papers and a limited number of contributions were presented and discussed. The specific aspects of the subject were treated in depth in the panel sessions, and the unresolved problems identified. Suitable as a practical reference, these volumes incorporate a systematic approach to two-phase flow analysis.
Download or read book A Fully Viscous Two dimensional Unsteady Flow Analysis Applied to Detonation Transititon in Porous Explosives written by Laurence Scott Samuelson and published by . This book was released on 1984 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Two Phase Flow and Heat Transfer written by Sadik Kakaç and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past two decades, two-phase flow and heat transfer problems associated with two-phase phenomena have been a challenge to many investigators. Two-phase flow applications are found in a wide range of engineering systems, such as nuclear and conventional power plants, evaporators of refrigeration systems and a wide vari ety of evaporative and condensive heat exchangers in the chemical industry. This publication is based on the invited lectures presented at the NATO Advanced Research Workshop on the Advances in Two-Phase Flow and Heat Transfer. The Horkshop was attended by more than 50 leading scientists and practicing engineers who work actively on two-phase flow and heat transfer research and applications in dif ferent sectors (academia, government, industry) of member countries of NATO. Some scientific leaders and experts on the subject matter from the non-NATO countries were also invited. They convened to discuss the state-of-the-art in two-phase flow and heat transfer and formulated recommendations for future research directions. To achieve these goals, invited key papers and a limited number of contributions were presented and discussed. The specific aspects of the subject were treated in depth in the panel sessions, and the unresolved problems identified. Suitable as a practical reference, these volumes incorporate a systematic approach to two-phase flow analysis.
Download or read book Modelling and Experimentation in Two Phase Flow written by Volfango Bertola and published by Springer. This book was released on 2014-05-04 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an up-to-date review of recent advances in the study of two-phase flows, with focus on gas-liquid flows, liquid-liquid flows, and particle transport in turbulent flows. The book is divided into several chapters, which after introducing basic concepts lead the reader through a more complex treatment of the subjects. The reader will find an extensive review of both the older and the more recent literature, with abundance of formulas, correlations, graphs and tables. A comprehensive (though non exhaustive) list of bibliographic references is provided at the end of each chapter. The volume is especially indicated for researchers who would like to carry out experimental, theoretical or computational work on two-phase flows, as well as for professionals who wish to learn more about this topic.
Download or read book Reactive Flow Modeling of the Interaction of TATB Detonation Waves with Inert Materials written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ignition & Growth model for the shock initiation and detonation of solid explosives is applied to calculating the main features of detonation waves in the triaminotrinitrobenzene (TATB) based high explosives LX-17, PBX 9502 and EDC-35. Under detonation conditions, TATB based explosives exhibit reaction zone lengths of 2 to 3 mm depending on the interactions between the detonation wave and the surrounding inert materials. This paper describes comparisons of Ignition & Growth calculations with data from several two- and three-dimensional experiments in which various materials are used to confine the TATB based explosives. The calculated unconfined failure diameters of PBX 9502 are normalized to the measured values at five initial temperatures. Failure diameters for LX-17 are then estimated by changing only the fraction ignited near the shock front. Fabry-Perot data on spherically divergent LX-17 snowball experiments is also compared to calculations. Calculated detonation velocities, wave front curvatures, and metal acceleration velocities are compared to experimental detonation data for TATB-based high explosives in tantalum, copper, PMMA, brass, and beryllium confinement. Three-dimensional prism failure test results on PBX 9502 are also stimulated using the ALE3D code.
