A three-equation turbulence model for high-speed flows  

作　　者：LIU JingYuan 

机构地区：[1]Aircraft Engineering College,Nanchang Hangkong University

出　　处：《Science China(Technological Sciences)》2013年第4期803-811,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 11102079);the Aeronautical Science Foundation of China (Grant No. 20111456005)

摘　　要：Adding a new equation to the two-equation K-turbulence model framework,this paper proposed a three-equation turbulence model to determine the density variance for high-speed aero-optics and high-speed compressible turbulent flows.Simulations were performed with the new model for supersonic and hypersonic flat-plate turbulent boundary layer and hypersonic ramp flows.The results showed that the prediction with the present model agrees well with the experimental data and is significantly better than the Lutz's model in predicting the density variance for the flat-plate flows.Furthermore,the present model can produce more accurate skin pressure and skin heat flux distributions than the original K-model in simulating hypersonic compression ramp flows with separation and reattachment and shock/boundary layer interactions.Without introducing a variety of ad hoc wall damping and wall-reflection terms,the proposed three-equation turbulence model is applicable to highspeed aero-optics and turbulent flows of real vehicles of complex configuration.

关 键 词：high speed turbulence model density variance AERO-OPTICS numerical simulation heat flux SEPARATION 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]