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Journal of Thermal Science

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2025 , Vol. 34 >Issue 1: 110 - 128

DOI: https://doi.org/10.1007/s11630-024-2077-y

Design and Application of Turbine Cascade Partitioned Endwall Profiling

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

网络出版日期: 2025-01-09

基金资助

The authors acknowledge 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).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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Design and Application of Turbine Cascade Partitioned Endwall Profiling

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

Online published: 2025-01-09

Supported by

The authors acknowledge 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).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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摘要

通过数值模拟研究了大节距、高载荷涡轮叶栅的分区端壁设计，分析了型线的顶点轴向位置和峰值点对二次流损失的影响。分区端壁造型主要由靠近前缘压力侧的凸结构和通道中下游吸力侧的凸结构组成。选择空气理想气体为工质，固定出口平均静压和入口平均总温，选用SST γ-θ湍流模型。数值模拟结果表明压力侧凸结构通过调节流场静压分布抑制了来流的展向和流向迁移趋势，进而有效限制了马蹄涡在压力侧的发展。吸力侧凸结构改变了流场的静压分布，使横流与吸力侧间的夹角增加，端壁吸力侧角区附近的低动量流体的积聚、角涡的发展和吸力侧尾缘的流动分离被抑制。因此，大节距、高载荷涡轮叶栅的能量损失系数从0.0564降低至0.0485，二次流损失减少了25%。

关键词： large-pitch highly loaded cascade; highly loaded design; non-axisymmetrical endwall design; secondary flow control; partitioned endwall profiling

本文引用格式

ZENG Fei , JIANG Ruiqi , XUE Xingxu , DU Wei , LUO Lei , ZHOU Xun . Design and Application of Turbine Cascade Partitioned Endwall Profiling[J]. 热科学学报, 2025 , 34(1) : 110 -128 . DOI: 10.1007/s11630-024-2077-y

Abstract

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.

Key words： large-pitch highly loaded cascade; highly loaded design; non-axisymmetrical endwall design; secondary flow control; partitioned endwall profiling

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