磁流体斜激波的汇合

MERGING OF MHD OBLIQUE SHOCKS

本文讨论磁流体快、慢激波的汇合作用规律，主要结论如下：（１）两个前向快激波汇合之后，形成一更强的前向快激波，尾随一前向慢稀疏波、一正接触间断（后侧密度大于前侧）、一后向慢激波和一后向快稀疏浚．（２）两个前向慢激波汇合之后，形成一更强的前向慢激波，尾随一正接触间断、一后向慢稀疏波和一后向快激波２在前向慢激波前方出现一前向快波，它或为稀疏浚（中、小激波角情况），或为激波（大激波角情况）．（３）前向快激波会追上前向慢激波而发生汇合，之后互换位置且强度减弱，尾随一正接触间断和一后向稀疏波对．

This paper discusses.the merging of fast and slow MHD shocks.The main conclusions are as follows.(1)Merging of two forward fast shocks forms a stronger forward fast shock, followed by a forward slow rarefaction wave,a positive contact surface(with a larger density at the rear),a reverse slow shock,and a reverse fast rarefaction wave.(2)Merging of two forward slow shocks forms a stronger forward slow shock, followed by a positive contact surface,a reverse slow rarefaction wave, and a reverse fast shock.A forward fast wave appears in front of the forward slow shock,being either a rarefaction wave for moderate shock angle case or a shock for large shock angle case.(3)A forward fast shock will catch up with a forward slow shock.As a result,the two shocks exchange places andreduce in strength, followed by a positive contact surface and a pair of reverse rarefaction waves.