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Design and Application of Turbine Cascade Partitioned Endwall Profiling

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Design and Application of Turbine Cascade Partitioned Endwall Profiling
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 comer vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction comer.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.

large-pitch highly loaded cascadehighly loaded designnon-axisymmetrical endwall designsecondary flow controlpartitioned endwall profiling

ZENG Fei、JIANG Ruiqi、XUE Xingxu、DU Wei、LUO Lei、ZHOU Xun

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AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China

School of Energy Science and Technology,Harbin Institute of Technology,Harbin 150001,China

Science and Technology on Diesel Engine Turbocharging Laboratory,China North Engine Research Institute,Tianjin 300270,China

large-pitch highly loaded cascade highly loaded design non-axisymmetrical endwall design secondary flow control partitioned endwall profiling

2025

10.1007/s11630-024-2077-y

热科学学报(英文版)
中国科学院工程热物理研究所

热科学学报(英文版)

影响因子：0.233
ISSN：1003-2169
年,卷(期)：2025.34(1)