摘要
高层防空拦截弹热保护罩的分离对红外窗口产生了巨大影响,该文采用可压雷诺平均Navier-Stokes方程、多块嵌套结构动网格技术和有限体积法模拟了热保护罩分离。采用FDS-ROE格式对Navier-Stokes方程进行离散,并通过LUSGS方法构造了二阶隐式的双时间推进格式。从而给出了分离过程中,由于激波干扰引起的红外窗口附近流场的变化,并对比了红外窗口处不同位置的压强振荡情况,跟踪了在各个时刻流场对于导弹上红外窗口的影响,预测了保护罩分离运动的轨迹,给出了各时间步对应等压线云图。
Infrared windows are dramatically influenced by the separation of interceptor missile shroud cover.Simulations on the interceptor missile shroud covers separation are based on compressible Reynolds Averaged Navier-Stokes（RANS） equations,moving multi-block chimera structure grid technique and finite volume method.The Roe＇s Flux Difference Splitting（FDS-ROE） method and a second-order implicit dual-time scheme reconstructed by Lower-Upper Symmetric Gauss-Siedel（LU-SGS） scheme are involved in solving Navier-Stokes equations.Consequently,the disturbed flow field near the infrared window due to the shock wave interaction during the separation is presented.And the pressure oscillations at different positions on the infrared window are compared.The influence of the flow field on the infrared windows at every time step is captured.Besides,the trajectory of the shroud covers is predicted and the pressure contours during the separation are described.
出处
《工程力学》
EI
CSCD
北大核心
2011年第7期252-256,共5页
Engineering Mechanics
基金
国家自然基金重大研究计划项目(90816008)
关键词
拦截导弹
热保护罩分离
红外窗口
压力震荡
嵌套网格
interceptor missile
shroud covers separation
infrared windows
pressure oscillations
overset grid
