带有球凹/球凸的旋转通道内流动结构和强化换热的数值研究

章大海; 李国强; 谢公南; 史桢超

doi:10.3879/j.issn.1000-0887.2013.09.010

带有球凹/球凸的旋转通道内流动结构和强化换热的数值研究

doi: 10.3879/j.issn.1000-0887.2013.09.010

¹中国石油大学(华东) 化学工程学院,山东青岛 266580;²西北工业大学机电学院,西安 710072)

基金项目: 中央高校基本科研业务费专项资金资助课题(27R1204026A)

详细信息

作者简介:
章大海(1978—)，男，山东枣庄人，副教授，博士(通讯作者. E-mail：dhzhang@upc.edu.cn).

中图分类号: V231.1; O39
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- 被引次数: 0
出版历程
- 收稿日期: 2013-03-11
- 修回日期: 2013-05-15
- 刊出日期: 2013-09-15

Numerical Research on Flow and Heat Transfer Performance in Rotating Channel With Hemispherical Dimples or Protrusions

¹College of Chemical Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.China;²School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, P.R.China

摘要

摘要: 对带有凹坑和凸包的内流通道在不同旋转数下的对流换热特性进行了数值分析，探讨了Coriolis力对通道中流场和换热特征的影响．研究发现，随着旋转数增加，通道前缘呈现出较弱的流动冲击，但存在较大的尾迹和延迟的流动再附着，后缘凹坑内部有一较小旋涡和较强射流使得后缘传热得到强化，最高可达60%．总体Nusselt数随着旋转数的增加先减小而后增大.
- 燃气轮机 /
- 凹坑 /
- 凸包 /
- 旋转 /
- 强化传热
Abstract: The convective heat transfer performance of internal cooling passage with hemispherical dimples or protrusions was numerically studied and the influence of Coriolis force on heat transfer characteristics in the channel flow was explored. It is found that: the leading edge of the channel shows weak flow impact with the increase of the rotation number, but there is a big wake and delayed flow reattachment; a smaller vortex and stronger jet exist in the dimple of the trailing edge, which make the heat transfer augmentation up to a maximum of 60%. With the increase of the rotation number, the overall Nusselt number decreases firstly and then increases.
- gas turbine /
- dimple /
- protrusion /
- rotation /
- heat transfer enhancement

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参考文献(17)

[1]	刘高文, 张丽, 郭涛. 凹坑强化传热的研究进展回顾[J]. 航空动力学报, 2007,22(11): 17851791.（LIU Gao-wen, ZHANG Li, GUO Tao. Review of heat transfer enhancement for dimpled surface[J].Journal of Aerospace Power,2007,22(11): 1785-1791.（in Chinese））
[2]	Murata A, Mochizuki S. Effect of crosssectional aspect ratio on turbulent heat transfer in an orthogonally rotating rectangular smooth duct[J]. Interentional Journal of Heat and Mass Transfer,1999,42(20): 3803-3814.
[3]	Abdel W S, Tafti D K. Large eddy simulations of flow and heat transfer in a 90° ribbed duct with rotation: effect of Coriolis forces[C]// Proceedings of ASME Turbo Expo, 2004-GT-53796.
[4]	Kim S, Young J L, Eun Y C. Effect of dimple configuration on heat transfer coefficient in a rotating channel[J].Journal of Thermophysics and Heat Transfer,2011,25(1): 165-172.
[5]	Griffith T S, AlHadrami L, Han J C, Ligrani P. Heat transfer in rotating rectangular cooling channels (AR=4) with dimples[J]. Journal of Turbomachinery,2003,125(3): 555-563.
[6]	Ligrani P M, Harrison J L, Mahmmod G I, Hill M L. Flow structure due to dimple depressions on a channel surface[J]. Phys Fluids,2001,13(11): 3442-3451.
[7]	Mahmood G I, Ligrani P M. Heat transfer in a dimpled channel: combined influences of aspect ratio, temperature ratio, Reynolds number, and flow structure[J].Interentional Journal of Heat and MassTransfer,2002,45(10): 2011-2020.
[8]	Ligrani P M, Mahmood G I, Harrison J L, Clayton C M, Nelson D L. Flow structure and local Nusselt number variation in a channel with dimples and protrusions on opposite walls[J]. Interentional Journal of Heat and Mass Transfer,2001,44(23): 4413-4425.
[9]	Mahmood G I, Sabbagh M Z, Ligrani P M. Heat transfer in a channel with dimples and protrusions on opposite walls[J]. Journal of Thermophysics and Heat Transfer,2001,15(3): 275-283.
[10]	Lan J B, Xie Y H, Zhang D. Flow and heat transfer in microchannels with dimples and protrusions[J].Journal of Heat TransferTransactions of the ASME,2012,134(2): 021901.
[11]	Xie G N, Sunden B, Wang Q W. Predictions of enhanced heat transfer of an internal blade tipwall with hemispherical dimples or protrusions[J]. Journal of Turbomachinery,2011,133(4): 041005.
[12]	Xie G N, Sunden B, Zhang W H. Comparisons of pins/dimples/protrusions cooling concepts for a turbine blade tipwall at high Reynolds numbers[J]. Journal of Heat Transfer,2011,133(6): 061902.
[13]	赵鹏, 刘高文, 朱晓华, 刘玉峰. 间距对凹坑强化传热和流动阻力的影响[J]. 航空动力学报, 2009,24(10): 22662271.(ZHAO Peng, LIU Gao-wen, ZHU Xiao-hua, LIU Yu-feng. Influence of dimple space on heat transfer enhancement and pressure loss in a dimpled rectangular channel[J].Journal of Aerospace Power,2009,24(10): 22662271.(in Chinese))
[14]	彭力, 刘高文, 薛彪, 夏全忠. 涡轮叶片凸包强化传热的数值仿真研究[J]. 计算机仿真, 2011,28(11): 5053.(PENG Li, LIU Gao-wen, XUE Biao, XIA Quan-zhong. Numerical investigation of heat transfer enhancement using convexity in turbine blade[J]. Computer Simulation,2011,28(11): 5053. (in Chinese))
[15]	申仲旸, 谢永慧, 张荻. 布置球窝的U型冷却通道传热性能研究[J]. 西安交通大学学报, 2013,47(3): 108113.(SHEN Zhong-yang, XIE Yong-hui, ZHANG Di. Heat transfer performance of U-shaped coolant channel with dimple structure[J]. Journal of Xi’an Jiaotong University,2013,47(3): 108-113. (in Chinese))
[16]	申仲旸, 谢永慧, 张荻, 蓝吉兵. 不同球窝/凸结构的旋转矩形通道传热及阻力特性研究[J]. 西安交通大学学报, 2011,45(7): 89-94.(SHEN Zhong-yang, XIE Yong-hui, ZHANG Di, LAN Ji-bing. Heat transfer and flow friction performance of rotating rectangular channels with different dimple/protrusion structures[J]. Journal of Xi’an Jiaotong University,2011,45(7): 89-94. (in Chinese))
[17]	Elyyan M A, Tafti D K. Effect of Coriolis forces in a rotating channel with dimples and protrusions[J]. Interentional Journal of Heat and Fluid Flow,2010,31(1): 1-18.