Design and Application of Turbine Cascade Partitioned Endwall Profiling  

作　　者：ZENG Fei JIANG Ruiqi XUE Xingxu DU Wei LUO Lei ZHOU Xun 

机构地区：[1]AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China [2]School of Energy Science and Technology,Harbin Institute of Technology,Harbin 150001,China [3]Science and Technology on Diesel Engine Turbocharging Laboratory,China North Engine Research Institute,Tianjin 300270,China

出　　处：《Journal of Thermal Science》2025年第1期110-128,共19页热科学学报(英文版)

基　　金：the financial support provided by the National Science and Technology Major Project(J2019-Ⅳ-0008-0076,No.2019-Ⅱ-0010-0030);Natural Science Fund for Excellent Young Scholars of Heilongjiang Province(No.YQ2021E023)。

摘　　要：The influence of partitioned profiling design based on a large-pitch highly loaded cascade is studied by numerical simulation.The partitioned profile is mainly composed of a pressure-side convex structure near the leading edge and a suction-side convex structure at the midstream and downstream sides of the passage.The influence of the change in the vertex axial position and peak value of the B-line on the secondary flow control is analyzed.In this paper,air(ideal gas)is selected as the flow media.The average static pressure at the outlet and the average total temperature at the inlet are kept constant.SST γ-θ is used as the turbulence model.The results show that the pressure-side convex structure suppresses the spanwise and pitchwise migration of the inlet flow by adjusting the static pressure distribution of the flow field,so the development of the pressure-side leg of the horseshoe vortex is effectively limited.The suction-side convex structure adjusts the static pressure distribution of the flow field and increases the included angle between the cross-flow and suction surface,so the accumulation of low-momentum fluid,the development of a corner vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction corner.Consequently,the energy loss coefficient of the large-pitch highly loaded cascade is decreased from 0.0564 to 0.0485,representing a 25% reduction in secondary flow losses.

关 键 词：large-pitch highly loaded cascade highly loaded design non-axisymmetrical endwall design secondary flow control partitioned endwall profiling 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]