航空学报 > 2025, Vol. 46 Issue (16): 131584-131584   doi: 10.7527/S1000-6893.2025.31584

考虑椭圆孔组合偏转的冷却布局多维高效优化

郭嘉杰, 陶志, 宋立明(), 李军   

  1. 西安交通大学 能源与动力工程学院,西安 710049
  • 收稿日期:2024-11-29 修回日期:2024-12-18 接受日期:2025-03-10 出版日期:2025-03-19 发布日期:2025-03-19
  • 通讯作者: 宋立明 E-mail:songlm@mail.xjtu.edu.cn
  • 基金资助:
    国家科技重大专项(2019-Ⅱ-0008-0028)

Multi-dimensional and efficient optimization of cooling layout considering combination of oval hole inclination angles

Jiajie GUO, Zhi TAO, Liming SONG(), Jun LI   

  1. School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China
  • Received:2024-11-29 Revised:2024-12-18 Accepted:2025-03-10 Online:2025-03-19 Published:2025-03-19
  • Contact: Liming SONG E-mail:songlm@mail.xjtu.edu.cn
  • Supported by:
    National Science and Technology Major Project (2019-Ⅱ-0008-0028)

摘要:

为深入挖掘考虑椭圆孔组合偏转的多变量设计空间,进一步提升凹槽叶顶的气热性能,采用稳态RANS数值模拟方法开展了凹槽叶顶的冷却布局优化研究,探究了优化结构的流场变化与性能提升机理。更为重要的是,为加速工程算例的优化速率,根据传统进化类算法框架,结合前沿优化算子,发展了适用于高维工程问题、快速收敛的优化算法并进行了函数测试,随后按单目标、双目标的次序开展了优化工作。优化结构降低了冷却孔布置间隔,采用大角度的正轴向偏转角提升了气膜贴壁性能,并且平衡了气膜覆盖与冷却孔朝向的耦合关系。结果显示,优化结构的气膜冷却效率相较于参考结构提升了79.9%,同时级效率上升了0.054%。

关键词: 涡轮, 凹槽叶顶, 气膜冷却, 椭圆孔, 多目标优化

Abstract:

To deeply explore the multivariate design space considering the combination of oval hole inclination angles, and further enhance the aero-thermal performance of the squealer tip, the steady-state RANS numerical simulation method was employed to optimize the cooling layout on a squealer tip. The variation of the flow field and the resulting performance improvement were analyzed. More importantly, to accelerate the rate of engineering optimization, a high fast-converging optimization algorithm suitable for high-dimensional engineering problems was developed based on the framework of a classical evolutionary algorithm and advanced optimization operators. Following classical function testing, a mixed optimization of single objective and bi-objective was conducted. The results demonstrated that in the optimal structure, the spacing between cooling holes is reduced, the wall attachment performance is improved with elevated positive axial inclination angles, and the coupling relationship between film coverage and cooling hole orientation is better balanced. The film cooling effectiveness is increased by 79.9%, and the enhancement of stage efficiency reaches 0.054% in comparison to the benchmark structure.

Key words: turbine, squealer tip, film cooling, oval hole, multi-objective optimization

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