Optimization of the Width and Angle Structure of Turbine Cooling Channel Bridges Using Response Surface Method

LIU Qilong; XIE Yonghui; ZHANG Di; KONG Xianglin; SU Pengfei; FANG Yu

doi:10.7652/xjtuxb202511013

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Optimization of the Width and Angle Structure of Turbine Cooling Channel Bridges Using Response Surface Method

更新时间：2025-11-11

- Optimization of the Width and Angle Structure of Turbine Cooling Channel Bridges Using Response Surface Method
- Journal of Xi'an Jiaotong University Vol. 59, Issue 11, Pages: 133-143(2025)
- 作者机构：
- 作者简介：
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- DOI：10.7652/xjtuxb202511013
  CLC： TK05
- Received：05 March 2025，
  
  Published：10 November 2025
- 稿件说明：
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LIU Qilong, XIE Yonghui, ZHANG Di, et al. Optimization of the Width and Angle Structure of Turbine Cooling Channel Bridges Using Response Surface Method[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 133-143.
DOI：

LIU Qilong, XIE Yonghui, ZHANG Di, et al. Optimization of the Width and Angle Structure of Turbine Cooling Channel Bridges Using Response Surface Method[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 133-143. DOI： 10.7652/xjtuxb202511013.

摘要

为满足新一代燃气轮机冷却通道对高效传热和低流动阻力的要求，提出了一种在U型通道内构建3个不同尺寸的桥结构的方案，旨在缓解转弯区域的过大压降并且竖直区域传热均匀性较差的问题。首先构建了含有可变尺寸和角度连接桥的U型通道，由ANSYS Meshing生成非结构网格并采用CFX软件进行计算，通过中心复合设计法生成初始样本数据。然后将响应面法与多目标遗传算法相结合，用于复杂工程优化问题的求解，并分析了桥尺寸及角度变化对流动和传热性能的影响。最后通过对多个候选方案的综合评估，给出了优化设计的推荐方案。分析结果表明，由于优化后的通道流场分布更加均匀，且连接桥的存在削弱了旋转状态下科氏力带来的旋转前缘面和后缘面传热不均匀的现象，尽管传热强度略有削弱，但通道的流动阻力在静止与旋转状态下分别降低了62.09%和56.26%。这种结构能够减少局部温度升高和减抗降阻，提高冷却效率，从而提升高压透平的安全性和可靠性。该研究为透平叶片高效低阻中弦冷却技术的发展提供了宝贵的数据参考。

Abstract

To meet the requirements of efficient heat transfer and low flow resistance in the cooling channels of the new generation of gas turbines

this study proposes a solution involving the construction of three bridges with varying dimensions within a U-shaped channel. This approach aims to mitigate the excessive pressure drop in the turn region and the uneven heat transfer distribution in the vertical regions. First

a U-shaped channel with adjustable bridge dimensions and angles is constructed. Unstructured meshes are generated using ANSYS Meshing

and computations are performed with CFX. Initial sample data are generated using the central composite design method

followed by the integration of response surface method and multi objective genetic algorithms to address complex engineering optimization problems. The effects of bridge dimensions and angles on flow and heat transfer performance are analyzed. Through a comprehensive evaluation of multiple candidate solutions

this study presents an optimized design recommendation. The results indicate that the optimized channel exhibits a more uniform flow field distribution

and the presence of the bridges mitigates the uneven heat transfer between the leading and trailing surfaces caused by Coriolis forces under rotating conditions. Although the heat transfer intensity is slightly reduced

the flow resistance of the channel decreases by 62.09% and 56.26% under stationary and rotating conditions

respectively. This structure can reduce local temperature spikes and lower flow resistance

thereby improving cooling efficiency and enhancing the safety and reliability of high-pressure turbines. The study provides valuable data references for the development of mid-chord cooling technologies in turbine blades with high efficiency and low resistance.

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references

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马良栋 1

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Related Institution

School of Energy and Power Engineering, Xi'an Jiaotong University

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