Flow and heat transfer in the complex passages of turbine blade trailing edge
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摘要: 实验研究了涡轮叶片尾缘带纵向隔板内冷通道的流动与换热特性.采用相变加热的方法为实验提供了等壁温边界条件,模型实验件采用了扰流柱和微小通道结构,并且分别与直隔板和波形隔板进行组合实验,以期望得到综合换热效果最优的组合.为了获得通道的局部换热信息,实验件的一侧外壁面被细分成了10个集水区域分别进行研究.结果表明:当Re在10 000~60 000之间时,综合换热效果最差的是直隔板加光通道的组合结构,综合换热效果最佳的是波形隔板加微小通道的组合结构.Abstract: Experimental method was used to study the characteristics of heat transfer and flow resistance in turbine blade trailing edge complex passages. This experiment use vapor heating method, and this method could make the experimental model have equivalent wall temperature boundary condition. The experiment models conduct the structure of the pin-fin arrays, micro channels and the diaphragm plate. The pin-fin arrays, micro-channels and the rectangular diaphragm plate, the waved diaphragm plate diaphragm plate were respectively combined. The outside wall was divided into ten regions to get the local heat transfer coefficient. When the Re was 10000~60000, the results shows that the structure with the worst general heat transfer performance is rectangular diaphragm plate plus optical channel, the structure with the best general heat transfer performance is the waved diaphragm plate plus micro-channels.
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Key words:
- micro-channels /
- pin-fin arrays /
- diaphragm plate /
- heat transfer /
- turbine blade trailing edge
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[1] 刘庆东.涡轮叶片新内冷结构的实验研究 .北京:北京航空航天大学能源与动力工程学院,2006 Liu Qingdong.Cooled turbine blade structure of a new experimental study .Beijing:School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,2006(in Chinese) [2] 曹玉璋,邱绪光.实验传热学[M].北京:国防工业出版社,1998 Cao Yuzhang,Qiu Xuguang.Experimental heat transfer[M].Beijing:National Defense Industry Press,1998(in Chinese) [3] 丁水汀,刘丽艳,李莉,等.涡轮叶片尾缘复合通道隔板结构[J].北京航空航天大学学报,2006,32(3):276-279 Ding Shuiting,Liu Liyan,Li Li,et al.Different structure diaphragm plates in complex passages of turbine blade trailing edge[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(3):276-279(in Chinese) [4] 丁水汀,刘丽艳,李莉,等.涡轮叶片尾缘复合通道中隔板结构对换热特性的影响[J].航空动力学报,2006,21(3):523-527 Ding Shuiting,Liu Liyan,Li Li,et al.The effect of different clapboards structure in turbine blade trailing edge complex passages on heat transfer characteristics [J].Journal of Aerospace Power,2006,21(3):523-527(in Chinese) -
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