Time-resolved visualization of coherent structures during supersonic boundary layer transition

作     者：Lin HE Xiaoge LU Junhao HAN Zhengbang WU Shihe YI Lin HE;Xiaoge LU;Junhao HAN;Zhengbang WU;Shihe YI

作者机构：College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China 

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

年 卷 期：2023年第36卷第4期

页      面：190-200页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 

基　　金：funded by the National Key Research and Development Program of China(No.2019YFA0405300) the Excellent Innovation Young Project of Changsha,China(No.KQ2009026) National Natural Science Foundation of China(No.91752102). 

主　　题：Coherent structures Flow visualization Supersonic boundary layer Time-resolved Transition 

摘      要：The coherent structures arising during flat-plate boundary layer transition at Mach num-ber 3.4 are investigated using a custom-built hyper-rate imaging system.The evolution of transi-tional structures is investigated in the Eulerian and Lagrangian reference frames.The upstream evolution of transition is dominated by the generation of new hairpin structures,while the interac-tion among multiple structural types dominates the evolution downstream.The breakdown of the existing structure,which may be caused by interactions among multiple types of structures with sim-ilar scales,is also visualized.