Design strategy and relevant flow mechanisms of highly loaded 3D compressor tandem cascades

作     者：Xiaochen MAO Yunyu WANG Zhihua DING Hao CHENG Bo LIU 

作者机构：School of Power and EnergyNorthwestern Polytechnical UniversityXi’an 710129China The National Key Laboratory of Science and Technology on Aerodynamic Design and ResearchXi’an 710129China Xi’an Thermal Power Research Institute Co.LtdXi’an 710072China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第7期

页      面：220-235页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：sponsored by the National Natural Science Foundation of China(Nos.52106057 and 92152301) the Fundamental Research Funds for the Central Universities,China(No.D5000210483) the Foundation of State Level Key Laboratory of Airfoil and Cascade Aerodynamics,China(Nos.D5150210006 and D5050220008) the 111 Project,China(No.B17037) the Key Laboratory of Flow Visualization and Measurement Techniques,AVIC Aerodynamics Research Institute,China(No.D5110220177) 

主　　题：Tandem cascade Interference effect Vortex structure Load split Compressor 

摘      要：To investigate the design strategy of highly loaded tandem cascades at both the midspan and endwall,the overall performance and flow mechanisms of four typical tandem cascades based on the optimization were analyzed from multiple perspectives *** results show that the interference effects on the Front Blade(FB)and Rear Blade(RB)should not be overlooked during the design phase,and the design strategies at the midspan and endwall are completely *** the midspan,the optimization aims to increase the interference effects and the strength of the gap jet while maintaining the same load on the FB and ***,the endwall optimal airfoil exhibits weakening interference effects,advancement of the gap jet location,and load transfer from the FB to *** further analysis of flow characteristics,the midspan optimal airfoil is beneficial for inhibiting the low-energy fluid from interacting with the suction surface of RB under the design condition,but results in earlier occurrence of corner *** endwall optimal airfoil helps suppress the development of the secondary flow and delay the onset of corner ***,by combining the benefits of these two design approaches,additional forward sweep effects are achieved,further enhancing the performance of the tandem cascade.