An improved deviation model for transonic stages in axial compressors  

作　　者：Xiaochen WANG Xuesong LI Xiaodong REN Chunwei GU Xiaobin QUE Guoyu ZHOU 

机构地区：[1]Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China [2]China United Gas Turbine Technology Co.Ltd.,Beijing 102209,China

出　　处：《Chinese Journal of Aeronautics》2024年第7期93-108,共16页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 52176039);the National Science and Technology Major Project of China (No. 2017-Ⅱ-0007-0021)

摘　　要：Deviation model is an important model for through-flow analysis in axial compressors.Theoretical analysis in classical deviation models is developed under the assumption of onedimensional flow,which is controlled by the continuity equation.To consider three-dimensional characteristics in transonic flow,this study proposes an improved theoretical analysis method combining force analysis of the blade-to-blade flow with conventional analysis of the continuity equation.Influences of shock structures on transverse force,streamwise velocity and streamline curvature in the blade-to-blade flow are analyzed,and support the analytical modelling of density flow ratio between inlet and outlet conditions.Thus,a novel deviation model for transonic stages in axial compressors is proposed in this paper.The empirical coefficients are corrected based on the experimental data of a linear cascade,and the prediction accuracy is validated with the experimental data of a three-stage transonic compressor.The novel model provides accurate predictions for meridional flow fields at the design point and performance curves at design speed,and shows obvious improvements on classical models by Carter and C¸etin.

关 键 词：Axial compressor Transonic flow Deviation model Through-flow method Aerodynamic performance 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]