| 开槽前扩孔及复合角对气膜冷却的影响 |
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| 引用本文： | 孙璐,章大海,曾敏,王秋旺.开槽前扩孔及复合角对气膜冷却的影响[J].工程热物理学报,2009,30(10). |
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| 作者姓名： | 孙璐 章大海 曾敏 王秋旺 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室,陕西西安,710049 |
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| 基金项目： | 国家重点基础研究发展规划项目 |
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| 摘 要： | 本文对开槽前扩孔及在此基础上加30°、45°和60°不同角度复合角的气膜冷却结构进行了数值模拟,计算了指定冷却壁面的温度场分布以及冷却效率.结果表明:引入复合角后,能够改善冷却气膜在壁面的横向分布,复合角越大,气膜分布越均匀.在高吹风比下,复合角结构能够产生较大的气膜覆盖范围和较好的冷却效果.
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| 关 键 词： | 气膜冷却 开槽前扩孔 复合角 |
EFFECTS OF A TRENCHED-HOLE,SHAPED HOLE AND COMPOUND ANGLE ON FILM COOLING |
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| SUN Lu,ZHANG Da-Hai,ZENG Min,WANG Qiu-Wang.EFFECTS OF A TRENCHED-HOLE,SHAPED HOLE AND COMPOUND ANGLE ON FILM COOLING[J].Journal of Engineering Thermophysics,2009,30(10). |
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| Authors: | SUN Lu ZHANG Da-Hai ZENG Min WANG Qiu-Wang |
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| Institution: | SUN Lu ZHANG Da-Hai ZENG Min WANG Qiu-Wang (State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | Numerical simulation technique is used to investigate the effects of a compound angle (30°,45°or 60°)on the film cooling performance based on a trench-shaped hole geometry.From the film cooling efficiency and velocity distribution,the results indicate that the compound angle can improve the lateral coverage of cooling film over a hot surface.Moreover,with the increase of the compound angle,the cooling film shows considerable uniform cover and better cooling performance,especially at a high blowing ratio. |
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| Keywords: | film cooling trench-shaped hole compound angle |
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