带肋曲面双层壁偏转内流与传热冷却特性数值研究

全帅宇; 白波; 张垲垣; 李志刚; 李军

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带肋曲面双层壁偏转内流与传热冷却特性数值研究

更新时间：2025-07-21

- 带肋曲面双层壁偏转内流与传热冷却特性数值研究
- Numerical Study on the Deflected Flow and Heat Transfer and Cooling Characteristics of Curved Double-Wall Structures with Pin-Fins
- 默认刊物名称 2025年
- 作者机构：
  
  西安交通大学叶轮机械研究所,陕西省西安市710049
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(52406053);国家资助博士后研究人员计划(GZC20241345)
- DOI：
  中图分类号：
- 收稿：2025-05-19，
  
  修回：2025-07-17，
  
  录用：2025-07-21，
- 稿件说明：
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全帅宇, 白波, 张垲垣, 等. 带肋曲面双层壁偏转内流与传热冷却特性数值研究[J/OL]. 默认刊物名称, 2025.

QUAN Shuaiyu, Bai Bo, Zhang Kaiyuan, et al. Numerical Study on the Deflected Flow and Heat Transfer and Cooling Characteristics of Curved Double-Wall Structures with Pin-Fins[J/OL]. Moren Journal, 2025.
全帅宇, 白波, 张垲垣, 等. 带肋曲面双层壁偏转内流与传热冷却特性数值研究[J/OL]. 默认刊物名称, 2025. DOI：

QUAN Shuaiyu, Bai Bo, Zhang Kaiyuan, et al. Numerical Study on the Deflected Flow and Heat Transfer and Cooling Characteristics of Curved Double-Wall Structures with Pin-Fins[J/OL]. Moren Journal, 2025. DOI：

摘要

针对带肋双层壁在曲面部件应用时，偏转内流与非均匀出流交互作用机理和传热冷却特性不明晰的问题，采用共轭传热方法对比分析了凸、平和凹面带肋双层壁在5种吹风比下狭窄内腔流动、非均匀出流和综合冷却特性。将平面带肋计算结果与实验结果进行对比，验证数值计算准确性。通过横向平均综合冷效等参数，分析不同结构及吹风比气膜冷却与冲击冷却性能。通过无量纲速度、温度与流线分析气膜、冲击冷却与偏转内流的耦合关系以及双层壁流阻特性。数值结果表明：降低冷气量要求下冷效较高的吹风比为0.6；在冲击腔室内，肋柱近冲击驻点一侧冷效较高，近气膜孔侧流动分离导致冷效较低，带肋双层壁流速比无肋结构快且流线更具规律性；凸面双层壁气膜孔出流冷气在外壁贴壁效果最佳，凹面双层壁气膜孔出流脱离壁面进入主流较多，吹风比为0.6时，凸面双层壁面的平均综合冷效比凹面的高了约8.09%。本研究可为透平叶片曲面带肋双层壁结构的冷却设计和性能分析提供理论依据。

Abstract

To address the unclear interaction mechanism between deflected internal flow and non-uniform outflow

as well as the heat transfer and cooling characteristics of pin-fin double-wall structures applied to curved components

a conjugate heat transfer method is employed to comparatively analyze the narrow-channel internal flow

non-uniform coolant outflow

and overall cooling performance of convex

flat

and concave pin-fin double-wall configurations under five different blowing ratios. Numerical results for the flat pin-fin structure are validated against experimental data to ensure the accuracy of simulations. The spanwise-averaged overall cooling effectiveness is used to evaluate the film and impingement cooling performance across different structures and blowing ratios. The coupling behavior among film cooling

impingement cooling

and deflected internal flow

as well as the flow resistance characteristics of the double-wall structures

are examined through analyses of dimensionless velocity

temperature

and streamlines. Results indicate that a blowing ratio of 0.6 provides relatively high cooling effectiveness with lower coolant demand. In the impingement chamber

higher cooling effectiveness is observed near the stagnation region of the pin-fin

while flow separation near the film hole side reduces local effectiveness. Compared to pinless structures

pin-fin double-wall configurations exhibit higher velocities and more organized flow patterns. Convex double-wall structures achieve the best wall-attachment effect of coolant outflow from film holes

while concave structures show more flow separation into the mainstream. At a blowing ratio of 0.6

the area-averaged overall cooling effectiveness of the convex structure is 8.09% higher than that of the concave structure. This study provides theoretical guidance for the cooling design and performance analysis of curved turbine blade components with pin-fin double-wall structures.

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references

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