Effect of Pin Fins and Ribs on the Aerothermal Characteristics for the Trailing Edge Cutback Channel of the Turbine Blade

YANG Kefeng; GAO Shanghong; WANG Xiangyu; LIU Zhao; FENG Zhenping

doi:10.19805/j.cnki.jcspe.2025.240538

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Effect of Pin Fins and Ribs on the Aerothermal Characteristics for the Trailing Edge Cutback Channel of the Turbine Blade

更新时间：2026-10-10

- Effect of Pin Fins and Ribs on the Aerothermal Characteristics for the Trailing Edge Cutback Channel of the Turbine Blade
- Chinese Journal of Power Engineering Vol. 45, Issue 11, Pages: 1803-1814(2025)
- 作者机构：
  
  西安交通大学能源与动力工程学院叶轮机械研究所,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240538
  CLC：
- Online First：17 November 2025，
  
  Published：17 November 2025
- 稿件说明：
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杨克峰,高尚鸿,汪翔宇,刘钊,丰镇平. 扰流柱肋对透平叶片尾缘劈缝通道气热特性的影响动力工程学报, 2025, 45(11): 1803-1814 https://doi.

org/10.19805/j.cnki.jcspe.2025.240538
杨克峰,高尚鸿,汪翔宇,刘钊,丰镇平. 扰流柱肋对透平叶片尾缘劈缝通道气热特性的影响动力工程学报, 2025, 45(11): 1803-1814 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240538.

org/10.19805/j.cnki.jcspe.2025.240538 DOI：

摘要

为了研究透平叶片尾缘冷却结构的气热特性

建立了带有劈缝结构的叶片L形收缩通道模型。通过数值分析比较了扰流柱、扰流肋以及其布置方式对流动与换热特性的影响

提出了同时采用热均匀性指数和热性能指数来评价通道的换热效率。结果表明:光滑通道中存在2个分离涡

且扰流柱和扰流肋对这2个分离涡有明显的抑制作用

并能显著增强通道换热能力;以热性能指数比较不同通道的换热特性时

带柱通道具有最佳的换热效率

但是考虑到换热分布均匀性时

柱肋通道有着最佳的换热效率;2种扰流结构的布置方式对热性能指数影响有限

但对努塞尔数分布均匀性影响明显;扰流肋和扰流柱叉排时的综合系数高

其比顺排时分别高5.23%和2.71%;建议在透平叶片尾缘劈缝的冷却设计时使用叉排布置的扰流柱肋结构。

Abstract

In order to study the aerothermal characteristics of trailing edge cooling structure of the turbine blade

a L-shaped wedge channel model with trailing edge cutback of the blade was established. The effects of the pin fins

ribs and their arrangement on the flow and heat transfer characteristics were numerically analyzed and compared

and it was proposed to use both the thermal uniformity index and the thermal performance index to evaluate the heat transfer efficiency of the channel. Results show that there are two separated vortices in the smooth channel. The pin fins and ribs have a significant restraining effect on these two vortices

which can significantly improve the heat transfer performance of the channel. When comparing the heat transfer characteristics of different channels using the thermal performance index

the channel with pin fins has the best heat transfer efficiency. However

when the uniformity of heat transfer distribution is considered

the channel with both ribs and pin fins has the best heat transfer efficiency. The arrangement of two types of turbulator structures has a limited effect on the thermal performance index

but has a significant effect on the uniformity of Nusselt number distribution. The comprehensive coefficients of the ribs and pin fins are higher in the staggered arrangement

which are 5.23% and 2.71% higher than that in the inline arrangement

respectively. Thus

it is recommended to use the staggered arrangement of the ribs and pin fins in the cooling design of the trailing edge cutback of the turbine blade.

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references

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