基于动网格技术的膛口流场数值模拟

膛口冲击流场作用时间短,且有炮口焰和炮口烟的存在而对记录仪器有一定的不可见性.因此要通过试验手段获得该流场的发展规律较为困难.数值模拟是获得流场发展规律的有效途径.采用二维轴对称Navier-Stokes方程结合标准k-ε湍流模型建立了膛口流场模型.应用分层动网格技术对弹丸运动情况进行描述.通过数值仿真得到了清晰的膛口初始流场和膛口流场的数值分布,并对初始膛口流场和膛口流场的变化规律进行了讨论和分析,对膛口气流流动研究具有指导意义.

Numerical Simulation of Muzzle Flow Field Based on Dynamic Meshing Technique

Muzzle shock flow field is always transient and invisible with regard to record instrument for the existence of muzzle flame and muzzle smoke,thus it is difficult to obtain the development rule of muzzle flow field with the help of experiment means. However,numerical simulation can be regarded as an effective way to acquire the flow field development rules.The 2D axial symmetry Navier-Stokes equations and standard turbulence model were used to set up the muzzle flow field model of gun system. Layer dynamic ...