| 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 |
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| 引用本文： | 章大海,李国强,谢公南,史桢超.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[J].应用数学和力学,2013,34(9):965-975. |
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| 作者姓名： | 章大海 李国强 谢公南 史桢超 |
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| 作者单位： | 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) |
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| 基金项目： | 中央高校基本科研业务费专项资金资助课题(27R1204026A) |
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| 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.
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| 关 键 词： | 燃气轮机 凹坑 凸包 旋转 强化传热 |
| 收稿时间： | 2013-03-11 |
Numerical Research on Flow and Heat Transfer Performance in Rotating Channel With Hemispherical Dimples or Protrusions |
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| ZHANG Da-hai,LI Guo-qiang,XIE Gong-nan,SHI Zhen-chao.Numerical Research on Flow and Heat Transfer Performance in Rotating Channel With Hemispherical Dimples or Protrusions[J].Applied Mathematics and Mechanics,2013,34(9):965-975. |
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| Authors: | ZHANG Da-hai LI Guo-qiang XIE Gong-nan SHI Zhen-chao |
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| Institution: | 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 |
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| 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. |
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