| 带有横向扩展出口的气膜冷却孔的紊流流场研究 |
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| 引用本文： | 施红辉,佐佐俊祐.带有横向扩展出口的气膜冷却孔的紊流流场研究[J].中国航空学报,2002,15(4). |
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| 作者姓名： | 施红辉 佐佐俊祐 |
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| 作者单位： | SHI Hong hui 1，2，SASA Shunyuu 3 (1. Department of Mechanics，Zhejiang University，Hangzhou 310027，China) (2. LNM，Institute of Mechanics，Chinese Academy of Sciences，Beijing 100080，China) (3. Department of Mechanical Engineering，Nagoya Institute of Technology，Nagoya 466\|8555，Japan) |
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| 摘 要： | 报道了用热线风速仪和流动可视化技术对带有横向扩展型孔的燃气轮机气膜冷却叶片紊流流场进行的研究。试验了三种射流 /主流质量流量比 ,即 M分别等于 0 .5 ,0 .89,1 .5的情况。测量了主流速度、紊流强度以及雷诺剪应力。通过分析沿主流方向和展向方向各紊流量的空间分布 ,可以得知横向扩展型孔对燃气轮机气膜冷却叶片紊流流场的改善状况。研制了发生干冰气雾的实验装置 ,并将其应用于观察射流与主流复杂的相互作用。流动可视化结果与热线风速仪测量结果相一致
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| 关 键 词： | 紊流流动 冷却膜 横向扩展型孔 热线风速仪 流动可视化 |
Study of Turbulent Flow of Film Cooling Holes with Lateral Expanded Exits |
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| SHI Hong-hui,SASA Shunyuu.Study of Turbulent Flow of Film Cooling Holes with Lateral Expanded Exits[J].Chinese Journal of Aeronautics,2002,15(4). |
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| Authors: | SHI Hong-hui SASA Shunyuu |
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| Abstract: | Hot wire measurements and flow visualization are presented for studying the turbulent flow field over a flat gas turbine film cooling blade with lateral expanded holes. Three mass flux ratios of jet to free stream, M = 0.5, 0.89, 1.5, are tested. The streamwise velocity, the turbulent intensities and the Reynolds shear stress are measured. The effect of the lateral expanded holes on the improvement of the turbulent flow field for film cooling of gas turbines can be analyzed from the measured spatial distributions of the turbulence quantities along the downstream direction and spanwise respectively. An experimental device of producing mist of dry ice (solid CO 2) has been developed and applied in visualizing the complex jet in crossflow interaction. The flow visualization provides a direct understanding to the effect of the lateral expanded holes. |
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| Keywords: | turbulent flow film cooling lateral expanded hole hot wire anemometry flow visualization |
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