具有声激波的跨音流管道中声传播的数值方法

A numerical method for computing sound propagation with shock waves in ducts with transonic flow

本文采用四阶MacCormack格式和附加四阶粘性项方法,求解具有声激波的跨音流变差分格壁管中的声传播问题,比前人结果有明显改善。本文详细介绍了这种差分方法,特别是关于截面硬式,人工粘性项和计算可靠性判据。这种方法省内存,省机时,可以在微机上实现计算。

A fourth order maccormack scheme with fourth order viscous term is used to solve the sound propagation in varying hard-wall ducts with transonic flow and acoustic shock waves. The results are considerably improved. In this paper, the new method is depicted in detail, especially about the schemes, viscous terms and computation correctness criterion. This method not only is storage-saving and time-saving but also can be carried out on the micro computers.