A high-order model of rotating stall in axial compressors with inlet distortion  

作　　者：Peng LIN Cong WANG Yong WANG 

机构地区：[1]School of Automation Science and Engineering,South China University of Technology [2]Department of Mechanics and Engineering Science,Peking University

出　　处：《Chinese Journal of Aeronautics》2017年第3期898-906,共9页中国航空学报（英文版）

基　　金：co-supported by the National Major Scientific Instruments Development Project of China(No.61527811);the National Science Fund for Distinguished Young Scholars of China(No.61225014);the Guangdong Inovative Project(No.2013KJCX0009);the Guangdong Provice Natural Science Foundation(No.2014A030312005);the Guangdong Provice Key Laboratory of Biomedical Engineering;the Space Intelligent Control Key Laboratory of Science and Technology for National Defense

摘　　要：In this paper,a high-order distortion model is proposed for analyzing the rotating stall inception process induced by inlet distortion in axial compressors.A distortion-generating screen in the compressor inlet is considered.By assuming a quadratic function for the local flow total pressure-drop,the existing Mansoux model is extended to include the effects of static inlet distortion,and a new high-order distortion model is derived.To illustrate the effectiveness of the distortion model,numerical simulations are performed on an eighteenth-order model.It is demonstrated that long length-scale disturbances emerge out of the distorted background flow,and further induce the onset of rotating stall in advance.In addition,the circumferential non-uniform distribution and time evolution of the axial flow are also shown to be consistent with the existing features.It is thus shown that the high-order distortion model is capable of describing the transient behavior of stall inception and will contribute further to stall detection under inlet distortion.In this paper,a high-order distortion model is proposed for analyzing the rotating stall inception process induced by inlet distortion in axial compressors.A distortion-generating screen in the compressor inlet is considered.By assuming a quadratic function for the local flow total pressure-drop,the existing Mansoux model is extended to include the effects of static inlet distortion,and a new high-order distortion model is derived.To illustrate the effectiveness of the distortion model,numerical simulations are performed on an eighteenth-order model.It is demonstrated that long length-scale disturbances emerge out of the distorted background flow,and further induce the onset of rotating stall in advance.In addition,the circumferential non-uniform distribution and time evolution of the axial flow are also shown to be consistent with the existing features.It is thus shown that the high-order distortion model is capable of describing the transient behavior of stall inception and will contribute further to stall detection under inlet distortion.

关 键 词：Axial compressors Dynamic modeling Flow instability Inlet distortion Rotating stall Stall inception 

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] TP391.41[自动化与计算机技术—计算机应用技术]