浙江电力

2020, v.39;No.290(06) 57-62

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燃气轮机叶片气膜冷却及换热特性研究
Analysis on Gas Turbine Blade Film Cooling and Heat Transfer Characteristics

王在华,戴惠庆,郑添,应光耀,毛志伟
WANG Zaihua,DAI Huiqing,ZHENG Tian,YING Guangyao,MAO Zhiwei

摘要(Abstract):

采用数值仿真软件,选用Realizable k-ε双方程湍流模型,对燃气轮机交叉孔叶片进行气膜冷却仿真研究;搭建实验平台,研究不同吹风比下的叶片冷却效率和对流换热系数;将仿真结果与实验数据进行对比,结果表明理论值与实验值具有一致性。最后得出结论:叶片前端气膜孔位置冷却效果最佳,沿着主气流方向,气膜冷却效果逐渐减弱;叶片吸力面的气膜冷却效果比压力面好;随着吹风比增大,气膜覆盖效果增强,冷却效率提高。
Numerical simulation software and the Realizable k-ε turbulence model are adopted for simulation study on film cooling of cross-hole blades. An experimental bench is set up to study the cooling efficiency and convective heat transfer coefficient of blades with different blowing ratios. The simulation results are compared with the experimental data, which indicates that the theoretical value is consistent with the experiment value.It is concluded that the cooling efficiency is the best at the leading edge film hole of the turbine blade, and the cooling efficiency decreases along the main flow direction; the cooling effect at the suction surface is better than that of the pressure surface; with the increase of blowing ratio, the effect of film covering is enhanced, and the cooling efficiency is improved.

关键词(KeyWords): 气膜冷却;吹风比;叶片;冷却效率;对流换热系数
film cooling;blowing ratio;blade;cooling efficiency;convective heat transfer coefficient

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王在华,戴惠庆,郑添,应光耀,毛志伟
WANG Zaihua,DAI Huiqing,ZHENG Tian,YING Guangyao,MAO Zhiwei

DOI: 10.19585/j.zjdl.202006010

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