大尺寸自由活塞激波风洞自由流参数诊断方法  

Diagnostic method for free flow parameters of large free piston shock tunnel

作　　者：谌君谋 金熠[2] 宋华振 文帅[1] 陈星[1] 纪锋[1] 易翔宇 卢洪波[1] 毕志献[1] SHEN Junmou;JIN Yi;SONG Huazhen;WEN Shuai;CHEN Xing;JI Feng;YI Xiangyu;LU Hongbo;BI Zhixian(China Academy of Aerospace Aerodynamics,Beijing 100074,China;Engineering and Materials Science Center,China University of Science and Technology,Hefei 230026,China)

机构地区：[1]中国航天空气动力技术研究院,北京100074 [2]中国科学技术大学工程与材料科学实验中心,安徽合肥230026

出　　处：《推进技术》2024年第6期227-239,共13页Journal of Propulsion Technology

基　　金：国家重点研发计划(2019YFA0405204)。

摘　　要：高焓激波风洞自由流具有一定程度的热化学非平衡,使得流场参数的确定存在困难。针对大尺寸自由活塞高焓激波风洞的总温2 700~4 700 K、总压5.6~20.3 MPa条件,采用非接触吸收光谱技术、接触测量技术等测试技术,结合多温度多组分数值模拟方法,共同诊断喷管名义马赫数10出口自由流的参数。结果显示,温度测量值与计算值最大偏差小于7.5%,速度测量值与计算值最大偏差小于5%,NO浓度测量值与计算中最大偏差小于12%。The free flow in the high enthalpy shock tunnel has a certain degree of thermochemical non-equilibrium,which makes it difficult to determine the flow field parameters.For the total temperature of 2700~4700 K and total pressure of 5.6~20.3 MPa in the large-sized free piston high enthalpy shock tunnel,non-contact absorption spectroscopy technology,contact measurement technology,and other test techniques were used,combined with multi temperature and multi-component numerical simulation methods,to jointly diagnose the parameters of the nozzle’s nominal Mach number 10 outlet free flow.The results show that the maximum deviation between the temperature measurement value and the calculated value is less than 7.5%,the maximum deviation between the speed measurement value and the calculated value is less than 5%,and the maximum deviation between the NO concentration measurement value and the calculated value is less than 12%.

关 键 词：高焓激波风洞 热化学非平衡 自由活塞 测试技术 数值模拟 自由流 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计]