Investigation on Multiple Cylindrical Holes Casing Treatment for Transonic Axial Compressor Stability Enhancement  

作　　者：YANG Chengwu ZHAO Shengfeng LU Xingen HAN Ge ZHU Junqiang 

机构地区：[1]Key Laboratory of Light-duty Gas-turbine/Institute of Engineering Thermophysics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Journal of Thermal Science》2014年第4期346-353,共8页热科学学报（英文版）

基　　金：Financial support from the National Natural Science Foundation of China(Project No.51176187 and 51206163);International special cooperation projects(Project No.2014DFR70080)

摘　　要：Casing treatment is one possible way of regaining axial compressor operating range. However, most of casing treatments extend the operating range with the cost of efficiency penalty. A new form of multiple cylindrical holes casing treatment(MHCT) with pre-swirl blowing for the NASA Rotor-37 has been designed based on profound understanding of the stall inception. Unsteady numerical simulations have been performed for Rotor-37 with and without MHCT. Parametric studies of the total extraction holes area and their axial locations show that the compressor performance deteriorates as the area ratio increases but the stall margin is extended and there is an optimum extraction holes axial location for stall margin extending. The better configuration of MHCT could extend the stall margin by 6.2% with only 0.23% peak efficiency reduction. Detailed analysis of the physical mechanism behind the stall margin improvement shows that the casing treatment could eliminate the passage blockage by suppressing breakup of tip leakage vortex and decrease the blade load in tip region, which both contribute to improve stall margin of transonic axial compressors.

关 键 词：Casing treatment Transonic axial compressor Stall margin extending Numerical simulation 

分 类 号：TH453[机械工程—机械制造及自动化]