二次流对带间隔式进气门引射喷管流场的影响  

Analysis of flow field of three-dimensional ejector nozzle with open-close alternate intake valve at transonic velocity

作　　者：李子杰[1] 王浩[1] 黄河峡[2] LI Zijie;WANG Hao;HUANG Hexia(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京理工大学能源与动力工程学院,南京210094 [2]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2023年第12期2937-2947,共11页Journal of Aerospace Power

摘　　要：通过仿真研究了跨声速飞行状态下(Ma=1.2)一种带间隔式进气门的引射喷管流动特性,获得了二次流对三次流流动状态、喷管流动结构以及推力性能的影响规律。结果表明:带有间隔式辅助进气门的引射喷管内部存在显著的横向流动,诱导产生了多对流向涡结构,沿着流动方向流向涡的尺度逐渐减小。主流始终处于过膨胀状态,主导了引射喷管的内流流动,并和二次流之间形成了一道剪切层结构。随着二次流落压比的升高,二次流和三次流流量增加,其对主流的束缚作用增强,主流过膨胀现象得到有效抑制,推力性能从0.698增加至0.819。To analyze the influence of different secondary air intake states,the flow characteristics of an ejector nozzle with open-close intake valves in the transonic flight state(Ma=1.2)were simulated and studied.By changing the nozzle pressure ratio(NPR)of the secondary flow,the flow state of the third flow,the development characteristics of the vortex,and the thrust performance in the nozzle were analyzed.The results showed that the airflow in the ejector nozzle with the open-close alternate intake valve had the phenomenon of lateral flow,forming a vortex ring that the size of the flow vortex gradually decreased along the flow direction.The main flow maintained an over-expansion state,which dominated the inner flow of the ejector nozzle,and formed a shear layer structure with the secondary flow.With the increase of the NPR of the secondary flow,the flow rates of the secondary and third flows increased,which led to a stronger binding effect on the main flow.Therefore,the mainstream over-expansion phenomenon was effectively suppressed,so the thrust performance increased from 0.698 to 0.819.

关 键 词：跨声速 引射喷管 间隔式进气门 流向涡 推力性能 

分 类 号：V235.213[航空宇航科学与技术—航空宇航推进理论与工程]