多形态狭缝型槽道结构的叶片前缘气膜冷却特性研究

肖俊峰; 闫昱彤; 高松; 何伟; 林梅; 王秋旺; 丰镇平

doi:10.7652/xjtuxb202609013

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多形态狭缝型槽道结构的叶片前缘气膜冷却特性研究

更新时间：2026-09-04

- 多形态狭缝型槽道结构的叶片前缘气膜冷却特性研究
- Investigation of Film Cooling Characteristics at a Blade Leading Edge with Multiple Slotted-Channel Configurations
- 西安交通大学学报 2026年60卷第9期页码：131-141
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
  西安热工研究院有限公司，710032，西安
- 作者简介：
  
  作者简介：肖俊峰（1974—），正高级工程师；
  林梅（通信作者），女，研究员，博士生导师。
- 基金信息：
  
  国家自然科学基金资助项目(52276037)
- DOI：10.7652/xjtuxb202609013
  中图分类号： TK14
- 收稿：2025-11-11，
  
  网络首发：2026-05-11，
  
  纸质出版：2026-09-10
- 稿件说明：
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肖俊峰, 闫昱彤, 高松, 等. 多形态狭缝型槽道结构的叶片前缘气膜冷却特性研究[J]. 西安交通大学学报,2026,60 (9):131-141. https://doi.org/10.7652/xjtuxb202609013.

XIAO Junfeng, YAN Yutong, GAO Song, et al. Investigation of Film Cooling Characteristics at a Blade Leading Edge with Multiple Slotted-Channel Configurations[J]. Journal of Xi'an Jiaotong University,2026,60 (9):131-141. https://doi.org/10.7652/xjtuxb202609013.
肖俊峰, 闫昱彤, 高松, 等. 多形态狭缝型槽道结构的叶片前缘气膜冷却特性研究[J]. 西安交通大学学报,2026,60 (9):131-141. https://doi.org/10.7652/xjtuxb202609013. DOI：

XIAO Junfeng, YAN Yutong, GAO Song, et al. Investigation of Film Cooling Characteristics at a Blade Leading Edge with Multiple Slotted-Channel Configurations[J]. Journal of Xi'an Jiaotong University,2026,60 (9):131-141. https://doi.org/10.7652/xjtuxb202609013. DOI：

摘要

针对重型燃气轮机透平叶片前缘离散气膜孔冷却效率有限、冷气易脱离壁面的问题，提出了一种狭缝型槽道气膜冷却结构。采用基于雷诺时均方程的数值模拟方法，研究了该结构及其下缘几何构型（横槽、锯齿槽、圆弧槽）以及0.7～1.5区间吹风比对气膜冷却流动换热特性的影响机理。结果表明，与传统离散孔相比，狭缝型槽道有效抑制了气膜脱离，在冷气出口下游约3倍孔径范围内形成稳定连续的近壁气膜，平均气膜冷却效率提升达77.7%。吹风比敏感性分析结果显示，当吹风比增至1.5时，尽管冷气出口温度分布均匀性下降，但近壁冷气流量占比升高，总体冷却效率仍有增强。下缘几何对调控流动分离具有关键作用：锯齿槽可通过诱导二次流增强横向扩散，获得最佳的气膜附壁性，使冷却效率相比横槽进一步提高27.3%；圆弧槽则通过降低局部阻力使冷却效率相比横槽提升了19.8%。该研究结果可为重型燃气轮机透平叶片前缘高效冷却结构的仿生设计提供理论参考。

Abstract

To address the limited cooling effectiveness of conventional discrete film-cooling holes at the leading edge of heavy-duty gas turbine blades and the tendency of the coolant to detach from the wall

a slotted-channel film-cooling structure is proposed.Numerical simulations based on the Reynolds-averaged Navier-Stokes（RANS）equations are performed to investigate the effects of the structure

its lower-edge geometries（transverse

serrated

and arc-shaped grooves）

and blowing ratios ranging from 0.7 to 1.5 on film-cooling flow and heat-transfer characteristics.It is shown that

compared with conventional discrete holes

film detachment is effectively suppressed by the slotted-channel structure

and a stable and continuous near-wall film is formed within approximately three hole diameters downstream of the coolant outlet

with the average film-cooling effectiveness increased by up to 77.7%.Blowing-ratio sensitivity analysis shows that when the blowing ratio increases to 1.5

although the uniformity of the temperature distribution at the coolant outlet decreases

the proportion of near-wall coolant flow increases

and the overall cooling effectiveness is still enhanced.Flow separation is significantly affected by the lower-edge geometry.Lateral diffusion is enhanced by secondary flows induced by the serrated groove

and the best film attachment is achieved

with the cooling effectiveness further increased by 27.3% compared with the transverse groove.For the arc-shaped groove

the cooling effectiveness is increased by 19.8% compared with the transverse groove through a reduction in local flow resistance.A theoretical reference for the biomimetic design of high efficiency leadingedge cooling structures for heavy-duty gas turbine blades is provided by these results.

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references

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