Experimental Investigation on Convective Heat Transfer Characteristics of High Blockage Ribs Channel

Journal of Propulsion Technology ›› 2018, Vol. 39 ›› Issue (2): 335-341.

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Experimental Investigation on Convective Heat Transfer Characteristics of High Blockage Ribs Channel

College of Energy and Power Engineering，Nanjing University of Astonautics and Aeronautics ，Nanjing 210016，China,College of Energy and Power Engineering，Nanjing University of Astonautics and Aeronautics ，Nanjing 210016，China,AECC Hunan Aviation Powerplant Research Institute，Zhuzhou 412002，China,AECC Hunan Aviation Powerplant Research Institute，Zhuzhou 412002，China and College of Energy and Power Engineering，Nanjing University of Astonautics and Aeronautics ，Nanjing 210016，China

Published:2021-08-15

高阻塞比肋化通道对流换热特性实验研究

周明轩¹,薛树林¹,贺宜红²,李维²,杨卫华¹

南京航空航天大学能源与动力学院，江苏南京 210016,南京航空航天大学能源与动力学院，江苏南京 210016,中国航发湖南动力机械研究所，湖南株洲 421002,中国航发湖南动力机械研究所，湖南株洲 421002,南京航空航天大学能源与动力学院，江苏南京 210016

作者简介:周明轩，男，硕士生，研究领域为飞机发动机热端部件热防护技术。
基金资助:
国家自然科学基金(51276088)。

Abstract

Abstract: The convective heat transfer characteristics on high blockage ribs channel are measured by experimental method. Reynolds number studied in this experiment is from 1400 to 4500. The rib height(e) to hydraulic diameter(H) ratios are 0.2 and 0.33， respectively. The rib spacing(S) to rib height(e) ratios(S/e) are 5， 10 and 15. The rib orientations in the ribs channel are symmetric and staggered arrangement. The experimental results show that: (1)The convective heat transfer coefficients increased with the increase of rib height and Reynolds number， though at the cost of higher pressure losses. (2)When the rib spacing to height ratio(S/e) is 10， it keeps a highest heat transfer coefficient and flow pressure loss in three kinds of rib spacing to height ratio 5， 10 and 15. (3)The convective heat transfer coefficient and flow pressure loss in symmetric arrangement ribs channel are higher than that in the staggered arrangement ribs channel.

Key words: Turbine blade；Rib channel；Convective heat transfer；Experimental investigation

摘要： 采用实验方法对高阻塞比肋化通道的对流换热特性进行了研究。实验的Re数为1400～4500，肋高(e)和通道水力直径(H)的比值(e/H)为0.2和0.33，肋间距(S)与肋高(e)的比值(S/e)为5， 10和15。肋化通道中的肋有顺排和叉排两种排列形式。研究结果表明:(1)随着阻塞比和Re数的增加，对流换热系数逐渐增大，但相应的流动损失亦不断升高。(2)无论是顺排还是叉排肋化通道，在肋间距比分别为5，10和15三种情况下，间距比为10的对流换热系数和流阻损失均高于其它两种情况。(3)在实验几何参数范围内，顺排肋化通道的对流换热系数和流动压损均高于叉排通道。

关键词: 涡轮叶片；肋化通道；对流换热；实验研究

ZHOU Ming-xuan¹,XUE Shu-lin¹,HE Yi-hong²,LI Wei²,YANG Wei-hua¹. Experimental Investigation on Convective Heat Transfer Characteristics of High Blockage Ribs Channel[J]. Journal of Propulsion Technology, 2018, 39(2): 335-341.

周明轩,薛树林,贺宜红,李维,杨卫华. 高阻塞比肋化通道对流换热特性实验研究[J]. 推进技术, 2018, 39(2): 335-341.

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Experimental Investigation on Convective Heat Transfer Characteristics of High Blockage Ribs Channel

高阻塞比肋化通道对流换热特性实验研究

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