基于RANS和DDES的跨音速透平叶栅的型面损失分析（英文）  

Profile Loss Analysis of Transonic Turbine Cascade with RANS and DDES

作　　者：李会 苏欣荣 袁新 Hui Li;Xin-rong Su;Xin Yuan

机构地区：[1]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Tsinghua University

出　　处：《风机技术》2018年第6期1-6,共6页Chinese Journal of Turbomachinery

基　　金：National Natural Science Foundation of China(No.51506107,No.51476082)

摘　　要：With the increase of blade loading, the loss prediction model used in the design process needs refinement and improvement to meet the high-performance design. For the turbine design, most of existing profile loss models are developed for subsonic and transonic cases and their accuracy in high Mach number flow are limited. The primary research interest of this work is to study the flow mechanism of turbine cascade with high Mach number and the related profile loss. In this work, a transonic turbine cascade with strong shock wave is numerically studied with Reynolds Averaged Navier-Stokes(RANS). Also, to overcome the limitations of RANS modeling, Delayed Detached Eddy Simulation(DDES) type high-fidelity turbulence simulation is also conducted. Based on the numerical results, the primary loss sources, including the boundary layer loss, the trailing loss and the shock loss are analyzed and results from existing loss models are assessed. The results from current work may help to develop refinement profile loss model for the design of turbine cascade working in the high Mach number regime.With the increase of blade loading, the loss prediction model used in the design process needs refinement and improvement to meet the high-performance design. For the turbine design, most of existing profile loss models are developed for subsonic and transonic cases and their accuracy in high Mach number flow are limited. The primary research interest of this work is to study the flow mechanism of turbine cascade with high Mach number and the related profile loss. In this work, a transonic turbine cascade with strong shock wave is numerically studied with Reynolds Averaged Navier-Stokes(RANS). Also, to overcome the limitations of RANS modeling, Delayed Detached Eddy Simulation(DDES) type high-fidelity turbulence simulation is also conducted. Based on the numerical results, the primary loss sources, including the boundary layer loss, the trailing loss and the shock loss are analyzed and results from existing loss models are assessed. The results from current work may help to develop refinement profile loss model for the design of turbine cascade working in the high Mach number regime.

关 键 词：TRANSONIC CASCADE Boundary Layer LOSS Trailing Edge LOSS Shock Wave RANS DDES 

分 类 号：TH[机械工程]