A numerical study of a turbulent mixing layer and its generated noise

作     者：LI Dong GUO Li ZHANG Xing HE GuoWei 

作者机构：The State Key Laboratory of Nonlinear MechanicsInstitute of MechanicsChinese Academy of Sciences 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2013年第56卷第6期

页      面：1157-1164页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11232011 and 11021262) the National Basic Research Program of China (Grant No. 2013CB834100)(Nonlinear science) 

主　　题：direct numerical simulation mixing layer space-time correlation noise 

摘      要：A direct numerical simulation of a turbulent mixing layer with the Reynolds number 500 and the convective Mach number 0.6 is performed and the results obtained are used to study the turbulent flow field and its generated *** the present simulation,the numerical techniques of absorbing buffer zones,artificial convection velocity and spatial filtering are used to achieve nonreflecting boundary *** self-similarity is used to validate the present numerical *** large-scale coherent structures are plotted together with the acoustic waves,which demonstrates the directivity of acoustic *** Lighthill s source and space-time correlations are further *** main contributions to mixing noise are identified in terms of large-scale coherent structures,Lighthill s source and space-time correlations.