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中文摘要：
应用多组分NS方程和频散可控耗散格式（DCD）计算了爆轰驱动激波风洞中反射激波／边界层／接触面的相互作用过程，分析了驱动气体与试验气体在壁面射流作用下的掺混机制及其对风洞试验时间的影响．为了延长风洞的试验时间，提出在风洞贮室内增设环形隔板，以隔离壁面射流，延长风洞试验时间的方法．计算结果表明：环形隔板确实可以限制驱动气体与试验气体的过早掺混，显著增加激波风洞的有效试验时间．
英文摘要：
A investigation on the interactions among the reflected-shock, boundary layer and contact region in the detonation-driven shock tunnel was carried out by applying Navier-Stokes equations in a multicomponent system and the dispersion controlled dissipative （DCD） scheme. In addition, the physical mechanism of test gas contamination caused by the wall jet was analyzed, which dramatically reduces the experimental duration in a shock tunnel. The numerical results indicated a simple and effective method of installing to increase the experimental duration.
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