摘要
从Ｒａｎｋｉｎｅ－Ｈｕｇｏｎｉｏｔ关系出发，以激波切向磁场ξ、上游激波角θ１和等离子体β１值为参数研究各类激波解的特性及相互关系，阐明各类激波强度随介质β值的变化规律．结果指出：（１）在ξ＜－１的Ⅰｂ型中间激波区和ξ＞４的快激波区存在双解；（２）慢激波可以直接和中间激波连接，但不能和快激波直接连接；（３）各类激波强度（用激波密度比衡量）随β１值均有变化：Ⅰｂ型中间激波上支随β１值增加而下降，下支则上升；Ⅰａ型中间激波和慢激波都随β１值增加而下降；快激波双解区上支随β１值增加而下降。下支上升；快激波在１＜ξ＜４区间的解随β１值增加而上升。
Based on the Rankine-Hugoniot relations and using the tangential magnetic field ratio ξ, the shock angle θ1 and the ratio of gas pressure to magnetic pressure β1 as the upstream parameters, the solution properties of various types of shock and the relations between them have been discussed, the change of shock strength with plasma β value are explained too. The results show that: 1. there are two shock solutions in Ⅰb intermediate shock region(where ξ<-1).and fast shock region (wbereξ>4); 2. the slow shock can be connected with Ⅰa intermediate shock directly, but cannot be with fast shock directly; 3.the shock strength(represents with shock density ratio) variates with β1: the upper branch solution ofⅠb intermediate shock decreases with β1, and the lower branch increases; the strength of Ⅰa intermediate shock and slow shock weaken with β1; the upper branch solution of fast shock for ξ>4decreases with β1,and the lower branch increases, the fast shock for 1<ξ<4 increases with β1 also.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1996年第6期721-728,共8页
Chinese Journal of Geophysics
基金
国家自然科学基金
