非轴对称超声速引射器实验研究  

Experimental Investigation on Non-Axisymmetric Supersonic Ejector

作　　者：苏一峰 单勇[1] 汪磊 SU Yifeng;SHAN Yong;WANG Lei(Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China)

机构地区：[1]南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室,南京210016 [2]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《重庆理工大学学报（自然科学）》2020年第5期91-98,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51306088)。

摘　　要：通过一系列试验分别研究了主次流压比、温比以及增压比对非对称结构的超声速引射器性能的影响。实验结果表明:存在一个最佳的主次流压比对应最大的引射系数,此时在平直段的出口刚好不出现激波,流体马赫数接近1;增大主次流温比,次流流量基本不变,主流流量降低,引射系数增大;引射系数随着增压比的增大而大幅度降低,甚至引起引射器不工作;虽然提高主次流压比能使引射器工作在更大范围的增压比下,但引射系数可能因为主次流压比的增加而降低。A series of experiments were conducted to investigate the influences of pressure ratio of primary and secondary flow,temperature ratio of primary and secondary flow and compression ratio on the performance for a non-axisymmetric supersonic ejector. The results show that there exists an optimum pressure ratio of primary and secondary flow corresponding to a highest pumping ratio. Under this circumstance,the shock waves just cannot pass the straight section while Mach number is 1.Increasing the temperature ratio of primary and secondary flow causes mass flow rate of primary flow decreases while the mass flow rate of secondary flow almost does not change,which results in the increasing of pumping ratio. Pumping ratio decreases while compression ratio increases. The ejector can resist higher compression ratio under a circumstance of higher pressure ratio,but pumping ratio decreases when pressure ratio increases.

关 键 词：非对称引射器 超声速流 性能实验 引射系数 激波 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程]