| 密度比对弯扭导叶扇形孔气膜冷却效率的影响 |
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| 引用本文： | 王晓增,阚瑞,刘存良.密度比对弯扭导叶扇形孔气膜冷却效率的影响[J].航空动力学报,2023,38(1):70-78. |
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| 作者姓名： | 王晓增 阚瑞 刘存良 |
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| 作者单位： | 1.中国航发商用航空发动机有限责任公司，上海 200241 |
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| 摘 要： | 针对带扇形气膜孔的三维弯扭的高压涡轮一级导叶，采用压力敏感漆传质类比测量技术，研究了不同密度比与质量流量比下叶片的全表面气膜冷却效率分布特性。结果表明：叶片气膜冷却效率随密度比和质量流量比的增加而增大，冷气密度比从1.0增加到2.0时，叶片展向平均气膜冷却效率提升6%～32%。气膜冷却效率随密度比呈现非线性的变化，冷气密度比从1.0增加到1.5时，气膜冷却效率的增幅较小，密度比从1.5增加到2.0时，气膜冷却效率的增幅较大。
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| 关 键 词： | 气膜冷却效率 密度比 质量流量比 导向叶片 压力敏感漆 |
| 收稿时间： | 2022-03-26 |
Effect of density ratio on film cooling characteristics of a bowed and twisted turbine vane with fan-shaped film holes |
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| Institution: | 1.Commercial Aircraft Engine Company Limited， Aero Engine Corporation of China，Shanghai 200241，China2.School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China |
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| Abstract: | The influences of density ratio and mass flow ratio on the full coverage film cooling effectiveness of a bowed and twisted high pressure turbine 1st stage vane were studied experimentally in a fan-shaped cascade wind tunnel. The pressure sensitive paint technique was used to measure the film cooling effectiveness of the vane. Results showed that the film cooling effectiveness increased with increasing density ratio and mass flow ratio. When the density ratio increased from 1.0 to 2.0, the spanwise averaged film cooling effectiveness increased by 6% to 32%. The film cooling effectiveness only had a minor increase when the density ratio increased from 1.0 to 1.5. However, it had a great increase when the density ratio increased from 1.5 to 2.0, meaning that the relationship between film cooling effectiveness and density ratio was non-linear. |
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