中文摘要：

针对卫星姿态调节舱体上喷管的测力面位置问题,使用Fluent流体计算软件,采用有限体积法,根据挡板位置和入口总压,对拉瓦尔喷管及其延伸流场进行了仿真,对挡板对喷管及其延伸流场的影响进行了分析。对3种出口直径分别为5.1、3.6、2.3的拉瓦尔喷管进行了数值计算,其推力大小均在10 N以内。研究结果表明,当挡板固定不动时,喷管Ⅰ、Ⅱ、Ⅲ的进出口压强比分别超过10、12、15时,挡板对喷管出口压强产生影响;当入口总压不变时,每类喷管都有相应挡板适合放置的位置区域,且不尽相同。

英文摘要：

Aiming at the load surface location problem of the nozzle which was in the satellite attitude adjustment capsule,the fluid calculation software Fluent was used to simulate the Laval nozzle and its extensional flow field by adopting finite volume method,according to the baffle position and inlet total pressure. Furthermore,the effect of the baffle on the nozzle and its extensional flow field were analyzed. Three kinds of Laval nozzles of which outlet diameters were respectively 5. 1,3. 6 and 2. 3 were employed to make numerical calculation,and the size of their thrust were all within 10 N. The results indicate when the baffle is fixed,the baffle makes an influence on the outlet pressure of nozzles if nozzle Ⅰ,Ⅱ,Ⅲ of inlet and outlet pressure ratios respectively exceed 10,12 and 15. When the inlet total pressure is constant,each type of nozzle has its corresponding location area of suitable placing the baffle,which is not the same with each other.