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Unsteady One-Dimensional Flow
Published in George Emanuel, Analytical Fluid Dynamics, 2017
Ballistics can be subdivided into internal, intermediate, external, and terminal regimes. For internal ballistics, the bullet or projectile is inside the gun barrel. In the intermediate regime (Merlen and Dyment, 1991; Jiang et al., 1998), the projectile is near the muzzle and the gas dynamics of the fow feld caused by the gas discharge from the barrel are of primary interest. External ballistics deals with the projectile in free fight, while terminal ballistics involves the interaction with a target. A gas dynamically oriented introduction to internal ballistics is provided in this section. Other resentations, which include additional references, can be found in the book by Farrar and Leeming (1983) and in the articles by Krier and Adams (1979) and by Freedman (1988). Our objective is to illustrate how unsteady waves can be utilized to understand the dynamics involved in internal ballistics. To avoid undue length and complexity, a number of assumptions and approximations are introduced. Suffcient physical content, however, is retained in order that the presentation should still be representative of the actual situation.
Reviews of Conferences in Russia
Published in Richard A. Pethrick, Gennadi E. Zaikov, Teiji Tsuruta, Naoyuki Koide, Polymer Yearbook 13, 2019
The International Conference on Combustion was held in Russia on June 21–26, 1993. The first part of the Conference was conducted in Moscow (June 21–23), and the second was in St. Petersburg (June 24–26). The Conference was dedicated to the memory of the greatest Soviet physicists. Professor Yakov B. Zel’dovich, who made an essential contribution in the development of the theory of combustion and explosion, chemical and physical kinetics, physical chemistry and chemical physics. The purposes of this Conference was to celebrate the 50th anniversary of Zel’dovich’s fundamental paper “on Theory of Combustion of Powders and Explosives” (1942). The conference highlighted theoretical and experimental research on combustion and intrachamber processes. mathematical and physical problems is simulation of combustion and internal ballistic processes.nonsteady combustion and pressure waves in practical systems.mechanisms and kinetics of ignition, flame propagation and extinction.combustion in extreme conditions (high and small pressure, gravity, irradiation, critical diameter, etc.).new experimental methods for diagnostics and investigations of combustion and intrachamber processes.physical and biological analogs of combustion.transition from combustion to detonation.wave phenomena in internal ballistics.
Movement of amphibious rifles fixed on the mount when shooting and operating underwater
Published in Waves in Random and Complex Media, 2022
Hung Nguyen Van, Doan Dao Van, A. M. Zenkour, Phung Van Minh, Do Van Thom
The force of shot () is divided into two stages: the projectile moves in the barrel () and the projectile moves out of the muzzle (). The force of shot when the projectile moves in the barrel () is dependent on the barrel gas pressure and is calculated from the result of internal ballistics. In this paper, we used the results according to reference [9].