| 新型缩放槽缝孔气膜冷却效率的数值研究 |
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| 引用本文： | 戴萍,林枫. 新型缩放槽缝孔气膜冷却效率的数值研究[J]. 汽轮机技术, 2009, 51(1) |
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| 作者姓名： | 戴萍 林枫 |
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| 作者单位： | 1. 哈尔滨工程大学动力与能源学院,哈尔滨150001;青岛科技大学机电学院,青岛266042
2. 中国船舶重工集团第703研究所燃气轮机研究室,哈尔滨,150036 |
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| 摘 要： | 基于控制容积法对三维定常不可压缩N-S方程进行离散,采用分区域非结构化网格及两层k-ε湍流模型,在吹风比M=0.6～1.5的情况下,对新型缩放槽缝形气膜孔进行了详细的平板气膜冷却数值汁算,得到了在喷孔射流下游处及叶高方向上的气膜冷却效率,并研究了其孔长与孔径比L/D对冷却效率的影响.计算结果表明:高吹风比对缩放槽缝孔沿中心线冷却效率的影响较为复杂;缩放槽缝形气膜孔下游的冷却效率并不随吹风比的变化而单调变化,而是在吹风比为1.0时存在最佳值;在孔口下游较远区域,两个相邻孔之间沿叶高方向的气膜覆盖性较好;缩放槽缝孔的冷却效率随着其孔长与孔径比L/D的增大而增大,当L/D>8时,增加的幅度趋缓.
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| 关 键 词： | 涡轮叶片 缩放槽缝孔 气膜冷却效率 湍流模型 数值模拟 |
Numerical Study on Film Cooling Effectiveness From Converging Slot-hole |
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| DAI Ping,LIN Feng. Numerical Study on Film Cooling Effectiveness From Converging Slot-hole[J]. Turbine Technology, 2009, 51(1) |
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| Authors: | DAI Ping LIN Feng |
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| Affiliation: | 1 College of Power and Energy Engineering;Harbin University of Engineering;Harbin 150001;China;2 College of Electromechanical Engineering;Qingdao University of Science and Technology;Qingdao 266042;3 Department of Gas Turbine;China Shipbuilding Industry Corporation 7th Institute;Harbin 150036;China |
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| Abstract: | Film cooling effectiveness downstream and spanwise distribution of one row of converging slot-holes at the blade were investigated using a three-dimensional finite volume method and multi-block technique at the blowing ratio ranging from 0.6 to 1.5.Previous successful application of a two-layer turbulence model to cylindrical is extended to predict film cooling for the converging slot-hole geometry.Also,effects of the length-to-diameter ratio of the converging slot-hole on film cooling effectiveness were st... |
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| Keywords: | turbine blade converging slot-hole film cooling effectiveness turbulence model numerical simulation |
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