Application of focused laser differential interferometer to hypersonic boundary-layer instability study

作     者：Tao YU Youde XIONG Jiaquan ZHAO Jie WU Tao YU;Youde XIONG;Jiaquan ZHAO;Jie WU

作者机构：School of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Engineering Structural Analysis and Safety AssessmentWuhan 430074China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第5期

页      面：17-26页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the State Key Laboratory for Turbulence&Complex Systems of Peking University for their support in this study support of National Numerical Wind-tunnel(No.2018-ZT1A03) National Natural Science Foundation of China grant(No.11702106) Fundamental Research Funds for the Central Universities(2019kfyXKJC001) 

主　　题：Bicoherence analysis Focused laser differential interferometer Hypersonic boundary-layer instability Non-intrusive measurement Wind tunnel experiment 

摘      要：Accurate prediction of hypersonic boundary-layer transition plays an important role in thermal protection system design of hypersonic *** by the capability of spatial diagnostics for hypersonic boundary-layer study,quite a lot of problems of hypersonic boundary-layer transition,such as nonlinearity and receptivity,remain *** work reports the application of focused laser differential interferometer to instability wave development across hypersonic boundary-layer on a flared cone *** begin with,the focused laser differential interferometer is designed and set up in a Mach number 6 hypersonic quiet wind tunnel with the focal point in the laminar boundary-layer of a 5 degree half-angle flared cone ***,instability experiments are carried out by traversing the focal point throughout the hypersonic boundary-layer and the density fluctuation along the boundary-layer profile is measured and *** results show that three types of instability waves ranging from 10 k Hz to over 1 MHz are co-existing in the hypersonic boundary-layer,indicating the powerful capability of focused laser differential interferometer in dynamic response resolution for instability wave study in hypersonic flow regime;furthermore,quantitative analyses including spectra and bicoherence analysis of instability waves throughout the hypersonic boundary-layer for both cold and heated cone models are performed.