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Author : Samuel Sopok
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Shot-by-shot Erosion Modeling of Retired 120mm M256 Gun Tube Number 1988 written by Samuel Sopok and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book Shot-By-Shot Erosion Modeling of Retired 120mm M256 Gun Tube #1988 written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As our gun erosion database increases for in-service and out-of-service 120-mm M256 tubes with M829Ax series rounds, distinct erosion patterns and mechanisms are emerging. Variability exists for M256 guns with M829Ax series rounds depending on round count, round type, round-conditioning temperature, and their order. Our M256/M829Ax gun system erosion model - with its interior ballistics, thermochemistry, and boundary layer components - is constantly being guided and refined by the erosion and materials analysis data from fired gun tubes. A recent refinement includes the improvement of the gun steel subsurface exposure model due to high quality, difficult to obtain data from in-service M256 tubes. Other recent refinements to the boundary layer heat transfer model are based on thermal data from M256 tubes. These refinements include the improvement/incorporation of case gas cooling effects, turbulent gas mixing/heating effects, and a very minor contribution from forcing cone-induced vena contracta cooling effects. These latter refinements are calibrated away from crack walls by positional thermal wall repacking depth, thermal wall transformation depth, and thermocouple data. A comprehensive gun erosion model is described for the 120-mm M256 gun with its M829Ax series rounds. In addition, a detailed shot-by-shot erosion modeling prediction is escribed for retired 120-mm M256 gun tube serial #1988. For this gun tube, the erosion prediction includes the two types of rounds fired, 829 and M829A2, and their three round-conditioning temperatures, hot, ambient, and cold. The gun erosion mechanism consists of heat checking the inert chromium plate, subsequent interfacial degradation of the subsurface gun steel substrate at the chromium crack bases, then chromium platelet spalling, and subsequent bare gun steel gas wash. This gun erosion model correctly calculates and predicts that the worst eroded region is at 1.2 to 2.4 meters from the rear face of the tube.
Author :
Publisher :
ISBN 13 :
Total Pages : 532 pages
Book Rating : 4.0/5 ( download)
Download or read book 35th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit written by and published by . This book was released on 1999 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 650 pages
Book Rating : 4.F/5 ( download)
Download or read book Aerospace America written by and published by . This book was released on 1998 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book 120-mm Gun Tube Erosion Including Surface Chemistry Effects written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model that addresses thermochemical erosion in gun tubes is presented. The model incorporates two interior ballistics codes-XKTC and IBHVG2-and the thermochemical code BLAKE to provide the necessary state variables and bulk species concentrations of the core flow as input. This erosion model utilizes a Crank-Nicolson integration scheme, with dynamic gridding capability to account for material ablation, as well as the addition of energy sources and heat transfer augmentation due to surface deviations. A mass transport scheme, utilizing the Lennard Jones 6-12 diffusion model, enables individual species to be transported to the surface from the core flow. Also fully coupled is a separate thermochemical routine which incorporates the NASA Lewis database. The code is written modularly, enabling the inclusion and modification of existing submodules. Erosion results comparing a fielded kinetic energy tank round and a candidate next generation tank round are presented. The thermochemical effects at the surface are also shown and discussed.
Author :
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ISBN 13 :
Total Pages : 980 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dietrich O. Hummel
Publisher : Springer Science & Business Media
ISBN 13 : 3642562116
Total Pages : 538 pages
Book Rating : 4.6/5 (425 download)
Download or read book Atlas of Plastics Additives written by Dietrich O. Hummel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: A must for experts in industry, this book describes the application of vibrational (FTIR, UV, Raman) and mass spectrometries and other instrumental techniques for identification and structure elucidation of plastics additives. Numerous tables and figures compress the state of the art.
Author : Donald E. Carlucci
Publisher : CRC Press
ISBN 13 : 1420066196
Total Pages : 514 pages
Book Rating : 4.4/5 (2 download)
Download or read book Ballistics written by Donald E. Carlucci and published by CRC Press. This book was released on 2007-12-14 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even the earliest weapon developers faced the need to understand how and why guns and ammunition work in order to improve their effectiveness. As weapons became more sophisticated, the field of ballistics naturally divided into three main areas of specialization: interior, exterior, and terminal ballistics. Providing unique coverage of all three ar
Author : Dennis R. Jenkins
Publisher : Specialty Press (MN)
ISBN 13 : 9781580070133
Total Pages : 0 pages
Book Rating : 4.0/5 (71 download)
Download or read book Fairchild-Republic A/OA-10 Warthog written by Dennis R. Jenkins and published by Specialty Press (MN). This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This top-flight series provides a review of the world's most exciting combat aircraft.
Author : Donald E. Carlucci
Publisher : CRC Press
ISBN 13 : 1466564393
Total Pages : 598 pages
Book Rating : 4.4/5 (665 download)
Download or read book Ballistics written by Donald E. Carlucci and published by CRC Press. This book was released on 2013-08-26 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing new chapters, homework problems, case studies, figures, and examples, Ballistics: Theory and Design of Guns and Ammunition, Second Edition encourages superior design and innovative applications in the field of ballistics. It examines the analytical and computational tools used to predict a weapon’s behavior in terms of pressure, stress, and velocity, demonstrating their applications in ammunition and weapons design. What’s New in the Second Edition: Includes computer examples in Mathcad (available on the CRC website) Adds a section of color plates, to better help readers visualize the physical concepts of ballistics Contains sections on modern explosives equations of state for detonation physics modeling and on probability of hit Provides a solutions manual for those teaching college and training courses This book covers exterior ballistics, exploring the physics behind trajectories, including linear and nonlinear aeroballistics, and focuses on the effects of projective impact, including details on shock physics, shaped charges, penetration, fragmentation, and wound ballistics. Reviews and integrates the fundamental science and engineering concepts involved in guns and ammunition Uses straightforward, easy-to-read style, and careful development of complex topics Shares insights rooted in the experience of renowned experts, many associated with the National Defense Industrial Association (NDIA) and International Ballistics Society The field of ballistics comprises three main areas of specialization: interior, exterior, and terminal ballistics. This book explains all three areas, offering a seamless presentation of the complex phenomena that occur during the launch, flight, and impact of a projectile.
Author : Donald E. Carlucci
Publisher : CRC Press
ISBN 13 : 1351678671
Total Pages : 642 pages
Book Rating : 4.3/5 (516 download)
Download or read book Ballistics written by Donald E. Carlucci and published by CRC Press. This book was released on 2018-03-15 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: With new chapters, homework problems, case studies, figures, and examples, Ballistics: Theory and Design of Guns and Ammunition, Third Edition encourages superior design and innovative applications in the field of ballistics. It examines the analytical and computational tools for predicting a weapon’s behavior in terms of pressure, stress, and velocity, demonstrating their applications in ammunition and weapons design. New coverage in the Third Edition includes gas-powered guns, and naval ordinance. With its thorough coverage of interior, exterior and terminal ballistics, this new edition continues to be the standard resource for those studying the technology of guns and ammunition.
Author : Steven J. Zaloga
Publisher : Bloomsbury Publishing
ISBN 13 : 1472817230
Total Pages : 81 pages
Book Rating : 4.4/5 (728 download)
Download or read book The Anti-Tank Rifle written by Steven J. Zaloga and published by Bloomsbury Publishing. This book was released on 2018-01-25 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of the tank in World War I led to the development of the first infantry weapons to defend against tanks. Anti-tank rifles became commonplace in the inter-war years and in the early campaigns of World War II in Poland and the Battle of France, which saw renewed use in the form of the British .55in Boys anti-tank rifle - also used by the US Marine Corps in the Pacific. The French campaign made it clear that the day of the anti-tank rifle was ending due to the increasing thickness of tank armour. Nevertheless, anti-tank rifles continued to be used by the Soviets on the Eastern Front with two rifles, the 14.5mm PTRS and PTRD, and were still in widespread use in 1945. They served again with Korean and Chinese forces in the Korean War, and some have even appeared in Ukraine in 2014–15. Fully illustrated and drawing upon a range of sources, this is the absorbing story of the anti-tank rifle, the infantryman's anti-armour weapon during the world wars.
Author : International Institute for Strategic Studies
Publisher :
ISBN 13 : 9781857437669
Total Pages : 0 pages
Book Rating : 4.4/5 (376 download)
Download or read book The Military Balance 2015 written by International Institute for Strategic Studies and published by . This book was released on 2015-02-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title contains region-by-region analysis of the major military and economic developments affecting defence and security policies and the trade in weapons. Detailed entries describe the military capabilities of 171 countries.
Author : Bruce Palmer
Publisher : University Press of Kentucky
ISBN 13 : 9780813128528
Total Pages : 266 pages
Book Rating : 4.1/5 (285 download)
Download or read book The 25-year War written by Bruce Palmer and published by University Press of Kentucky. This book was released on 1984 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John S. Orme
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (317 download)
Download or read book Initial Flight Test Evaluation of the F-15 ACTIVE Axisymmetric Vectoring Nozzle Performance written by John S. Orme and published by . This book was released on 1998 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full envelope database of a thrust-vectoring axisymmetric nozzle perfomance for the Pratt & Whitney Pitch/Yaw Balance Beam Nozzle (P/YBBN) is being developed using the F-15 Advanced Control Technology for Integrated Vehicles (ACTIVE) aircraft. At this time, flight research has been completed for steady-state pitch vector angles up to 20 deg. at an altitude of 30,000 ft from low power settings to maximum afterburner power. The nozzle performance database includes vector forces, internal nozzle pressures, and temperatures all of which can be used for regression analysis modeling. The database was used to substantiate a set of nozzle performance data from wind tunnel testing and computational fluid dynamic analyses. Findings from initial flight research at Mach 0.9 and 1.2 are presented in this paper. The results show that vector efficiency is strongly influenced by power setting. A significant discrepancy in nozzle performance has been discovered between predicted and measured results during vectoring.
Author : Gerard E. Welch
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (317 download)
Download or read book Wave Turbine Analysis Tool Development written by Gerard E. Welch and published by . This book was released on 1998 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A quasi-one-dimensional (Q-1-D) computational fluid dynamic solver, previously developed and validated for pressure-exchanger wave rotors, is extended in the present work to include the blade forces of power producing wave rotors (i.e., wave turbines). The accuracy of the single-passage Q-1-D solver is assessed relative to two two-dimensional solvers: a single-passage code and a multi-block stator/rotor/stator code. Comparisons of computed results for inviscid, steady and unsteady flows in passage geometries typical of wave rotors reveal that the blade force model is accurate and that the correlation (effective stress and heat flux) terms of the Q-1-D passage-averaged formulation can be neglected. The ends of the rotor passages pose particular challenges to Q-1-D formulations because the flow there must at times deviate significantly from the mean camber line angle to match the port flow fields. This problem is most acute during the opening and closing of the rotor passages. An example sub-model is developed to account for the deviation between the flow departure angle and the mean camber line exit angle that occurs as an inviscid flow decelerates to meet a uniform pressure boundary. Comparisons of results from four-port wave turbine simulations reveal that the Q-1-D solver currently overpredicts wave turbine performance levels and highlight the need to devote future effort to the boundary conditions and sub-models of the Q-1-D solver.
Author : Daniel E. Paxson
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)
Download or read book An Incidence Loss Model for Wave Rotors with Axially Aligned Passages written by Daniel E. Paxson and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
