Controlling secondary flow in high-lift low-pressure turbine using boundary-layer slot suction

作     者：Xiao QU Liunan LI Yingjie ZHANG Xingen LU Junqiang ZHU Yanfeng ZHANG Xiao QU;Liunan LI;Yingjie ZHANG;Xingen LU;Junqiang ZHU;Yanfeng ZHANG

作者机构：School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Light-Duty Gas-TurbineInstitute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China School of Aeronautics and AstronauticsUniversity of Chinese Academy of SciencesBeijing 100190China 

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3期

页      面：21-33页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：support for this work was provided by the National Natural Science Foundation of China(No.52206060) the National Science and Technology Major Project of China(Nos.J2019-Ⅱ-0021-0042 and J2019-Ⅱ-0002-0022) 

主　　题：Low-pressure turbine Secondary flow Flow control Boundary-layer suction Incoming wake 

摘      要：The design of high-lift Low-Pressure Turbines(LPTs)causes the separation of the boundary layer on the suction side of the blade and leads to a strong secondary *** present study aims to minimize secondary losses through endwall slot suction and incoming wakes in a front-loaded high-lift LPT cascade with Zweifel of 1.58 under low Reynolds number of *** slotted schemes for the boundary layer of the endwall were designed(Plan A and Plan B),and the effects of suction mass flow on secondary flow were *** underlying physics of the endwall boundary layer of the suction and secondary flow under unsteady wakes was *** results show that slot suction at the endwall boundary layer can significantly suppress the secondary flow by removing low-momentum *** A and B significantly reduced the secondary kinetic energy by 44.2%and 36.9%,respectively,compared with the baseline cascade at the suction mass flow ratios of 1%.With an increase in the mass flow ratio of suction,the secondary flow was gradually reduced in both Plans A and *** is more beneficial to control the secondary flow to destroy the intersection of the pressure side and suction side of the horseshoe vortex before it develops into a passage *** unsteady wakes,the combined effects of incoming wakes and endwall boundary layer suction can further suppress the secondary flow at the suction mass flow ratios of 2%for Plan A,because the positive and negative vorticity inside upstream wakes accelerated the mixing of the main flow and secondary flow and thus increased the energy of secondary vortices.