真实气体效应下高马赫数内转进气道特性研究  

Study on Characteristics of High Mach Number Inward Turning Inlet under Real Gas Effect

作　　者：代春良 孙波[1] 梁晓扬[1] 卓长飞[1] 张堃元[2] DAI Chun-liang;SUN Bo;LIANG Xiao-yang;ZHUO Chang-fei;ZHANG Kun-yuan(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;College of Power and Energy Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

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

出　　处：《推进技术》2020年第7期1473-1483,共11页Journal of Propulsion Technology

摘　　要：为初步研究高马赫数内转进气道在真实气体效应下的工作特性,首先设计额定工作状态Ma=12的高超声速内转进气道,再结合不同气体模型对其进行数值模拟。研究结果表明:化学非平衡气体在流场结构、工作性能和气动加热方面与热完全气体较为相近,与热化学非平衡气体存在一定差别。离解反应发生在边界层内和低速涡流区内,热化学非平衡气体的离解反应程度比化学非平衡气体大。在隔离段内激波反射处,相比完全气体,化学反应气体的静温降低了2000~2500K。高热流区在上壁面喉道位置与下壁面激波反射点位置附近,温度较高的等温壁面、热化学非平衡气体均可降低壁面热流密度,不同壁面条件对隔离段出口性能参数影响较为明显。真实气体效应、壁面温度对隔离段涡流区的影响较为复杂,有待进一步研究。In order to preliminarily study the working characteristics of the high Mach number inward turning inlet under real gas effect,firstly the hypersonic inward turning inlet with rated working state Ma=12 was designed,then it was numerically simulated with different gas models.The results show that the chemical non-equilibrium gas is similar in flow field structure,performance and aerodynamic heating to thermally perfect gas,and there is a certain difference from thermochemical non-equilibrium gas.The dissociation reaction occurs in the boundary layer and the low-speed vortex region,and the degree of dissociation reaction of the thermochemical non-equilibrium gas is larger than that of the chemical non-equilibrium gas.At the shock reflection region in the isolator,the static temperature of the chemical reaction gas decreases by about 2000~2500 K compared with that of the perfect gas.The high heat flux region is close to the location of the throat on up-wall and the reflection point of the shock wave on low-wall.The higher temperature isothermal wall and thermochemical non-equilibrium gas can reduce the wall heat flux.Different wall conditions have obvious influence on performance parameters of isolator outlet.The effects of real gas effects and wall temperature on the vortex zone of isolator are complex and need further study.

关 键 词：真实气体效应 高马赫数内转进气道 数值模拟 热化学非平衡气体 壁面温度 进气道特性 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]