【摘要】 <正> 1.引言 流场分离控制技术是寻求有关装置性能改善的一个重要途径。本文探讨的亚音扩压器壁面局部开槽技术是多种附面层分离控制方法中的一种,早在60年代初就做了试验研究,至70年代中期,研究仍限于直壁扩压器内和对总体性能的测定及分析。之后,1983年就钝头体后体开槽从减阻角度对外流进行了试验研究,并对分离的控制现象提出了较形象的解释。本文更多还原

【Abstract】 An effective inner boundary layer separation control method was investigated experi mentally.On studying the influence of grooving treatment on the overall performence of the subsonic diffuser, the mechanisms of boundary layer(B.L) separation phenomenon and of the sep-arationdelay-effect of grooves were specially investigated. It was realized that the B.L separation orocess is closely related to the development and distributions of vorticities’ within the B.L, while the groove treatment was aimed at controlling the vortex distributions to delay B. L. separation.The method investigated in the work could be of value to the aspect of choosing an efficient way of controlling diffuser separation, and be an alternative in engineering applica tion.更多还原