| 平行进气孔气膜冷却对流换热系数的实验研究(英文) |
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| 引用本文： | 杨卫华,张靖周.平行进气孔气膜冷却对流换热系数的实验研究(英文)[J].南京航空航天大学学报(英文版),2012,29(1):46-53. |
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| 作者姓名： | 杨卫华 张靖周 |
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| 作者单位： | 南京航空航天大学能源与动力学院,南京,210016,中国 |
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| 摘 要： | 设计了单排,双排和三排分布形式和不同孔径的离散气膜孔结构,采用实验的方法分别对其对流换热特性进行了研究。研究结果表明,对流换热系数随着吹风比的增大而增大。在小吹风比时,沿冷却壁面的对流换热系数变化分为3个区段,在较大的吹风比或者孔径较大时,离散孔气膜冷却对流换热系数的分布规律与气流横掠平壁的对流换热规律基本相似。此外,在气膜孔当量直径一定的情况下,气膜孔的排列形式和吹风比均对对流换热系数有显著的影响。
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| 关 键 词： | 气膜冷却 平行进气孔 多排分布 对流换热系数 |
EXPERIMENTAL STUDY OF HTC FOR FILM COOLING OF PARALLEL-INLET HOLES |
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| Yang Weihua
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Zhang Jingzhou.EXPERIMENTAL STUDY OF HTC FOR FILM COOLING OF PARALLEL-INLET HOLES[J].Transactions of Nanjing University of Aeronautics & Astronautics,2012,29(1):46-53. |
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| Authors: | Yang Weihua Zhang Jingzhou |
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| Institution: | (College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,210016,P.R.China) |
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| Abstract: | The parallel-inlet holes with one-row,two-row and three-row film hole arrangements and different diameters are proposed to experimentally study their cooling characteristics.Detailed experimental processes and results are described and carried out.Results indicate that heat transfer coefficient(HTC)is increased with the increase of blowing ratio.When the blowing ratio is lower,the distribution of HTC along the heated wall can be divided into three regions.For larger blowing ratio or diameter,the cooling characteristics of parallel-inlet film holes are similar to those of convective heat transfer around flat.Furthermore,when hole diameter is determined,the arrangement patterns of film hole and the blowing ratio take a great influence on HTC. |
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| Keywords: | film cooling parallel-inlet hole multiple-row arrangement heat transfer coefficient (HTC) |
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