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)

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