预处理AUSM+格式在全速域反应流模拟中的应用

Application of preconditioned AUSM+ scheme on numerical simulation of reacting flows at all speeds

对预处理修正的AUSM+(advection upwind splitting method+)格式进行了详细讨论,并将其应用于全速域范围内的化学反应流场数值模拟.基于多组分Navier-Stokes方程,结合控制方程时间导数项的预处理,采用预处理修正的AUSM+格式发展了一种模拟全速域范围内化学反应流场的有效算法.验证算例包括超声速、亚声速以及极低速情形的化学反应流场,计算结果表明基于预处理AUSM+格式发展的算法能够有效地用于全速域范围内化学反应流动问题的模拟.

Preconditioned AUSM+(advection upwind splitting method+) scheme was discussed in details and was applied to numerical simulation of multi-component chemical reacting flows at all speeds.Based on multi-component Navier-Stokes equations with time-derivative preconditioning,an effective algorithm for simulating the reacting flows over a wide range of Mach numbers was developed using the preconditioned AUSM+ scheme.Numerical experiments,including supersonic flow,subsonic flow and low speed flow,show that the al...