Multidimensional, Two-Phase Simulations of Notional Telescoped Ammunition Propelling Charge PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
One of the many challenges facing weapon developers is the requirement for a highly lethal, lightweight, and compact large caliber gun system. One concept recently investigated by the U.S. Army is that of a swing-chamber gun, necessitating the use of telescoped ammunition. Such ammunition not only reduces the volume available for the propellant change, but also places severe geometric constraints on both the distribution of the propellant and the location and functionality of the ignition system. Lumped parameter codes cannot capture the influence of these configurational complexities on the processes of flame spreading and the formation of ensuing pressure waves. One-dimensional, two-phase flow interior ballistic simulations reveal the likelihood of such waves and raise the concern for possible damage to the ammunition (projectile). Multidimensional, two-phase interior ballistic simulations provide quantitative predictions of the flow in the annular region between the sidewall of the telescoped projectile and the cartridge case, also show the formation of pressure waves, and further the concern over projectile damage. Initial results are shown from ongoing work to couple an interior ballistics code with a gun/projectile structural dynamics code. Pressure waves in the charge produce a very demanding environment for the projectile which necessitates the use of a more substantial structure, with the attending sharp reduction in cargo capacity, or the use of exotic materials in order to insure a successful launch.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
One of the many challenges facing weapon developers is the requirement for a highly lethal, lightweight, and compact large caliber gun system. One concept recently investigated by the U.S. Army is that of a swing-chamber gun, necessitating the use of telescoped ammunition. Such ammunition not only reduces the volume available for the propellant change, but also places severe geometric constraints on both the distribution of the propellant and the location and functionality of the ignition system. Lumped parameter codes cannot capture the influence of these configurational complexities on the processes of flame spreading and the formation of ensuing pressure waves. One-dimensional, two-phase flow interior ballistic simulations reveal the likelihood of such waves and raise the concern for possible damage to the ammunition (projectile). Multidimensional, two-phase interior ballistic simulations provide quantitative predictions of the flow in the annular region between the sidewall of the telescoped projectile and the cartridge case, also show the formation of pressure waves, and further the concern over projectile damage. Initial results are shown from ongoing work to couple an interior ballistics code with a gun/projectile structural dynamics code. Pressure waves in the charge produce a very demanding environment for the projectile which necessitates the use of a more substantial structure, with the attending sharp reduction in cargo capacity, or the use of exotic materials in order to insure a successful launch.
Author: Kenneth Kuan-yun Kuo
Publisher: John Wiley & Sons
ISBN: 1118127560
Category : Science
Languages : en
Pages : 602
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Book Description
A hands-on, integrated approach to solving combustion problems in diverse areas An understanding of turbulence, combustion, and multiphase reacting flows is essential for engineers and scientists in many industries, including power genera-tion, jet and rocket propulsion, pollution control, fire prevention and safety, and material processing. This book offers a highly practical discussion of burning behavior and chemical processes occurring in diverse materials, arming readers with the tools they need to solve the most complex combustion problems facing the scientific community today. The second of a two-volume work, Applications of Turbulent and Multiphase Combustion expands on topics involving laminar flames from Professor Kuo's bestselling book Principles of Combustion, Second Edition, then builds upon the theory discussed in the companion volume Fundamentals of Turbulent and Multiphase Combustion to address in detail cutting-edge experimental techniques and applications not covered anywhere else. Special features of this book include: Coverage of advanced applications such as solid propellants, burning behavior, and chemical boundary layer flows A multiphase systems approach discussing basic concepts before moving to higher-level applications A large number of practical examples gleaned from the authors' experience along with problems and a solutions manual Engineers and researchers in chemical and mechanical engineering and materials science will find Applications of Turbulent and Multiphase Combustion an indispensable guide for upgrading their skills and keeping up with this rapidly evolving area. It is also an excellent resource for students and professionals in mechanical, chemical, and aerospace engineering.
Author: C. A. Brebbia
Publisher: WIT Press
ISBN: 1845640772
Category : Technology & Engineering
Languages : en
Pages : 257
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Book Description
Containing the proceedings of the Third International Conference on Computational Ballistics, this book presents new ideas and advanced developments in the field of study of Computational Ballistics. Ballistic studies include applications as varied as the study of the structural and control behavior of rockets and communication satellites; bird strike effects on commercial aircraft, terrorist attacks and automobile crack worthiness modelling. Many basic problems of ballistics are similar to those in other fields of applications, such as combustion, heat conduction, in-flight structural behaviour, trajectory related issues, contact, impact, penetration, structural response to shock waves and many others.A valuable contribution to its field, this text will be of interest to researchers involved in the different areas of computational ballistics and their relationship between computational methods and experiments. Notable topics include: Systems and Technolog; Combustion and Heat Transfer; Propellants; Fluid Dynamics; Fluid Flow and Aerodynamics; In-Flight Structural Behaviour and Material Response; Guidance and Control; Perforation and Penetration Mechanics; Fluid-structure Interaction; Experimental Mechanics/ballistic and Field Testing; High Rate Loads; Composite Material; Shock and Impact.
Author: Michael J. Nusca
Publisher:
ISBN:
Category : Ammunition
Languages : en
Pages : 26
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Book Description
Author: Paul S. Gough
Publisher:
ISBN:
Category :
Languages : en
Pages : 207
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Book Description
The TDNOVA code was developed to simulate the interior ballistics of multi-increment propelling charges by means of a numerical solution of the equations of two-dimensional, two-phase flow. The present work describes extensions to the code, primarily to permit the simulation of rigidized stick propellant charges, and secondarily to explore the ballistic consequences of heat loss to the tuber and of slow gas-phase kinetics. (Author).
Author: A. W. Horst
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
One-dimensional, two-phase flow, interior ballistics codes, successfully applied on numerous occasions to cased-ammunition problems, have proven to be less satisfactory in simulating flamespread and pressurization profiles in bagged propelling charges. Configural complexities associated with the charge/chamber interface, as well as ill-characterized impedances to gas and solid-phase flows offered by the bag and other parasitic components, rendered treatment of most artillery charges outside the scope of existing models. Simulations of the US 155-mm, M198 Howitzer firing the Zone 8S, M203 Propelling Charge, obtained using the one-dimensional NOVA code, clarify this problem. Solutions are then presented which are based on a quasi-two-dimensional code in which the charge and the unoccupied portion of the gun chamber are represented as disjoint but coupled regions of one-dimensional flow. Early-time gas flow external to the bag is shown to alter the flame path and equilibrate pressures throughout the chamber; however, this process reflects both the extent and persistence of the ullage, which are seen to be direct consequences of bag dimensions and material characteristics. The impact of these processes on a current effort to develop a fully two-dimensional NOVA code is discussed, and the status of this 2-D code with respect to the bagged-charge problem is outlined.
Author:
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 35
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Book Description
Examines some key factors that have led to meaningful technology generation and incorporation into current U.S. Army weapons systems.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1102
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Book Description
Author: Department Army
Publisher: Createspace Independent Publishing Platform
ISBN: 9781973920519
Category :
Languages : en
Pages : 480
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Book Description
This manual is a dual-Service US Army and US Marine Corps publication introducing new terms and definitions and updating existing definitions as reflected in the latest editions of Army field manuals and Marine Corps doctrinal, warfighting, and reference publications. It complies with DOD Military Standard 2525. When communicating instructions to subordinate units, commanders and staffs from company through corps should use this manual as a dictionary of operational terms and military graphics.
Author:
Publisher:
ISBN:
Category : Combat survivability (Military engineering)
Languages : en
Pages : 6
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Book Description
