Heat Transfer in Rotating Two-Pass Square Duct with 45° Ribbed Walls under High Rotation Numbers

Journal of Propulsion Technology ›› 2015, Vol. 36 ›› Issue (9): 1339-1346.

• Combustion , Heat and Mass Transfer • Previous Articles Next Articles

Heat Transfer in Rotating Two-Pass Square Duct with 45° Ribbed Walls under High Rotation Numbers

National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics/School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China,National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics/School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China,National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics/School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China; Collaborative Innovation Center of Advanced Aero-Engine，Beijing 100191，China and R&D center，AVIC Commercial Aircraft Engine Corporation Ltd，Shanghai 201108，China

Published:2021-08-15

高旋转数下45°斜肋回转通道平均换热特性研究

陈豪^1,2,邓宏武^1,2,李洋^1,2,田淑青³

北京航空航天大学航空发动机气动热力重点实验室/能源与动力工程学院，北京 100191; 先进航空发动机协同创新中心，北京 100191,北京航空航天大学航空发动机气动热力重点实验室/能源与动力工程学院，北京 100191; 先进航空发动机协同创新中心，北京 100191,北京航空航天大学航空发动机气动热力重点实验室/能源与动力工程学院，北京 100191; 先进航空发动机协同创新中心，北京 100191,中航商用航空发动机有限责任公司设计研发中心，上海 201108

作者简介:陈豪(1990—)，男，硕士生，研究领域为叶片内冷通道换热。

Abstract

Abstract: In order to get a more in-depth investigation of the heat transfer characteristics of the rotating channels，a new investigation of the average heat transfer characteristics of the rotating two-pass channel with 45° ribs was implemented. The Reynolds and Rotation numbers ranged from 10000 to 70000 and 0 to 2.07 respectively. Three different channel angles(0°，22.5°，45°)were selected to study the effects of channel orientation on average heat transfer of the four sides on the two-pass U channel. The results show that the 45° ribs enhance the heat transfer while weakening the effects of rotation on heat transfer. The angled rib induced secondary flow which touched off a critical inverse flow on outer and inter face caused a critical heat transfer phenomenon. The orientation enhanced the heat transfer in the first-pass and weakened it in the second pass. The effect of the orientation is not notable in the low Rotation numbers while becoming stronger in the high Rotation numbers.

Key words: Rotating heat transfer；Cooling channel；High rotation number；High reynolds number；Orientation

摘要： 为了更加深入地研究涡轮叶片回转通道的换热特性，研究了高旋转数下带45°斜肋回转通道的平均换热特性。在通道进口雷诺数从10000～70000，旋转数从0～2.07的范围内，实验研究了旋转状态下，方形截面带45°斜肋U型通道径向出流与径向入流两个流程四个侧面在0°，22.5°和45°三个安装角下的平均换热系数。研究结果表明:45°斜肋增强了通道换热，减弱了旋转对换热的影响；由于浮升力作用在肋间二次流上，导致通道内外侧出现临界回流现象；转角减弱了第一通道旋转对换热的影响，增强了第二通道旋转对换热的影响，其影响在低旋转数下并不显著，在高旋转数下开始变得明显。

关键词: 旋转换热；内冷通道；高旋转数；高雷诺数；转角

CHEN Hao^1,2,DENG Hong-wu^1,2,LI Yang^1,2,TIAN Shu-qing³. Heat Transfer in Rotating Two-Pass Square Duct with 45° Ribbed Walls under High Rotation Numbers[J]. Journal of Propulsion Technology, 2015, 36(9): 1339-1346.

陈豪,邓宏武,李洋,田淑青. 高旋转数下45°斜肋回转通道平均换热特性研究[J]. 推进技术, 2015, 36(9): 1339-1346.

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[18] Huh M, Liu Y H, Han J C. Effect of Rib Height on Heat Transfer in a Two Pass Rectangular Channel (AR= 1:4) with a Sharp Entrance at High Rotation Numbers[J]. International Journal of Heat and Mass Transfer, 2009, 52(19): 4635-4649.(编辑:梅瑛)　　　　　　　　　　　　　*　收稿日期:2014-06-04；修订日期:2014-09-03。作者简介:陈豪(1990—),男,硕士生,研究领域为叶片内冷通道换热。E-mail: chenhao1789@sina.com

Heat Transfer in Rotating Two-Pass Square Duct with 45° Ribbed Walls under High Rotation Numbers

高旋转数下45°斜肋回转通道平均换热特性研究

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