| 气膜孔形状对涡轮叶片气膜冷却影响的研究进展 |
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| 引用本文： | 李广超,柏树生,吴冬,张魏.气膜孔形状对涡轮叶片气膜冷却影响的研究进展[J].热能动力工程,2010,25(6). |
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| 作者姓名： | 李广超 柏树生 吴冬 张魏 |
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| 作者单位： | 沈阳航空航天大学动力与能源工程学院辽宁省数字化工艺仿真与试验技术重点实验室; |
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| 摘 要： | 气膜冷却是航空发动机叶片上采用的冷却方式之一,气膜孔结构对冷却效率影响非常显著。通过对不同形状孔射流气膜冷却回顾,指出了圆柱孔射流冷却的有害涡流动结构。论述了几何结构和气动参数对气膜冷却特性的影响,提出了一种高效气膜冷却孔结构——双出口气膜孔。利用商业软件对双出口射流的冷却效率进行了数值模拟。结果表明,双出口孔射流时,形成的涡结构有利于冷气贴附在壁面。最后给出了圆柱孔和双出口孔射流冷却效率对比结果,无论在平板上还是在叶片前缘,双出口孔射流冷却效率都明显高于圆柱孔射流冷却效率。
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| 关 键 词： | 航空发动机 涡轮叶片 气膜冷却 双出口孔 冷却效率 气膜孔形状 |
Recent Advances in the Study of Influence of Air-film Hole Shapes on Turbine Blade Air-film Cooling |
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| LI Guang-chao,BAI Shu-sheng,WU Dong,et al.Recent Advances in the Study of Influence of Air-film Hole Shapes on Turbine Blade Air-film Cooling[J].Journal of Engineering for Thermal Energy and Power,2010,25(6). |
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| Authors: | LI Guang-chao BAI Shu-sheng WU Dong |
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| Affiliation: | LI Guang-chao,BAI Shu-sheng,WU Dong,et al(Liaoning Provincial Key Laboratory on Digital Process Simulation and Test Technology,College of Power and Energy Source Engineering,Shenyang University of Aeronautics and Astronautics,Shenyang,China,Post Code: 110136) |
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| Abstract: | Air-film cooling constitutes a cooling mode adopted for the blades of aeroengines and the air-film hole structures exercise a most conspicuous influence on the cooling efficiency.After a retrospection of the jet flow air-film cooling from holes in different shapes,the authors pointed out a harmful vortex flow pattern existing in the cylindrical hole jet flow cooling.Furthermore,they also described the influence of the geometric structures and aerodynamic parameters on the air-film cooling characteristics an... |
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| Keywords: | aeroengine turbine blade air-film cooling dual outlet hole cooling efficiency air-film hole shape |
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