等截面超-超引射器流场结构及引射性能  

Flow structure and performance of constant-area,supersonic-supersonic ejector

作　　者：陈健[1] 王振国[1] 吴继平[1] 徐万武[1] 

机构地区：[1]国防科学技术大学高超声速冲压发动机技术重点实验室,长沙410073

出　　处：《强激光与粒子束》2012年第6期1301-1305,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11172324)

摘　　要：为考察超声速引射器直接引射超声速二次流时的性能,采用纹影技术和压力测量手段对一等截面超-超引射器的流场结构及其引射性能进行了实验研究。研究结果表明:一、二次流交汇后在混合室前段形成了复杂的超声速流场结构。根据二次流在混合室入口流动状态的不同,可将超-超引射划分为"非饱和超-超引射"和"饱和超-超引射"两种工作状态;二次流在混合室入口处产生的激波提高了引射器的压力匹配性能;在给定的引射系数下,引射器的增压性能随二次流马赫数的增大而降低,而引射马赫数对引射器压力恢复性能的影响不大。A constant-area,supersonic-supersonic ejector has been investigated with schlieren photography and pressure measurement.The operation states of the ejector are classified into two groups,according to the flow conditions of the secondary flow in the entrance part of the mixing chamber：one is ＂non-saturated supersonic-supersonic ejection＂ and the other is ＂saturated supersonic-supersonic ejection＂.The shock waves,generated in the secondary flow at the vicinity of the mixing chamber inlet,enhance the pressure matching performance of ejector.For a given primary-to-secondary mass flow rate,the compression ratio of the ejector decreases as the secondary Mach number increases,while the pressure recovery performance is only weakly dependent on the primary Mach number.

关 键 词：超-超引射器 高能化学激光器 压力匹配性能 压力恢复性能 

分 类 号：TN248.5[电子电信—物理电子学]