带炮口装置时某火炮膛口流场数值仿真

研究炮口装置能控制火药气体从膛口流出后的流动状态,可以改变身管受力及膛口流场射流结构分布状况,对火炮武器系统性能有重要影响。为研究某新型炮口装置性能及其对弹丸运动影响问题,提高精度,采用计算流体力学结合动网格技术,建立了包含炮口装置和运动弹丸的膛口流场数值仿真模型,利用轴对称Euler方程组和有限体积法(FVM),对带炮口装置的某火炮膛口流场进行了数值仿真。仿真结果反映了带炮口装置时膛口流场发展过程及射流结构的主要特征。根据数值仿真结果分析了膛口流场对弹丸受力状况及运动状态的影响。仿真结果表明某新型炮口装置对膛口流场结构有较大影响,并会影响弹丸出炮口后运动状态,从而影响火炮射击精度。

Muzzle Flow Field Simulation of Gun with a Muzzle Attachment

Muzzle attachments can control outflow of powder gas from gun barrel,and change the resultant force on the barrel and the configuration of muzzle flow field. Muzzle attachments have important effects on the performance of the weapon system. To study the performance of a new muzzle attachment and its influence on the bullet moving parameters,a model studying moving bullet and muzzle attachment with computational fluid dynamics and dynamic mesh techniques is presented in this paper to simulate the complicated...