Numerical investigations on dynamic process of muzzle flow  

作　　者：姜孝海 范宝春 李鸿志 

机构地区：[1]National Key Laboratroy of Transient Physics,Nanjing University of Science and Technology

出　　处：《Applied Mathematics and Mechanics(English Edition)》2008年第3期351-360,共10页应用数学和力学（英文版）

基　　金：the National Key Laboratory of Transient Physics of China

摘　　要：The integrative process of a quiescent projectile accelerated by high-pressure gas to shoot out at a supersonic speed and beyond the range of a precursor flow field was simulated numerically. The calculation was based on ALE equations and a second-order precision Roe method that adopted chimera grids and a dynamic mesh. From the predicted results, the coupling and interaction among the precursor flow field, propellant gas flow field and high-speed projectile were discussed in detail. The shock-vortex interaction, shockwave reflection, shock-projectile interaction with shock diffraction, and shock focus were clearly demonstrated to explain the effect on the acceleration of the projectile.The integrative process of a quiescent projectile accelerated by high-pressure gas to shoot out at a supersonic speed and beyond the range of a precursor flow field was simulated numerically. The calculation was based on ALE equations and a second-order precision Roe method that adopted chimera grids and a dynamic mesh. From the predicted results, the coupling and interaction among the precursor flow field, propellant gas flow field and high-speed projectile were discussed in detail. The shock-vortex interaction, shockwave reflection, shock-projectile interaction with shock diffraction, and shock focus were clearly demonstrated to explain the effect on the acceleration of the projectile.

关 键 词：GASDYNAMICS numerical simulation muzzle flow dynamic process 

分 类 号：TJ012.2[兵器科学与技术—兵器发射理论与技术]