| 矩形通道内层流对流换热的最优速度场 |
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| 引用本文： | 宋伟明,孟继安,李志信.矩形通道内层流对流换热的最优速度场[J].工程热物理学报,2011(1):133-136. |
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| 作者姓名： | 宋伟明 孟继安 李志信 |
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| 作者单位： | 热科学与动力工程教育部重点实验室清华大学航天航空学院; |
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| 基金项目： | 国家重点基础研究发展规划资助项目(No.2007CB206901) |
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| 摘 要： | 针对矩形通道内的层流对流换热问题,通过数值求解速度场协同方程,得到了给定黏性耗散条件下通道内的最优速度场为多纵向涡的流动结构,表明多纵向涡流型可在流阻增加不多的情况下使换热显著强化.通过在通道壁面布置不连续双斜肋,在通道内产生了接近于最优速度场的多纵向涡流动,数值计算结果表明,在Re=1000时,与光滑通道相比,不连续...
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| 关 键 词： | (火积)耗散极值原理 纵向涡 不连续双斜肋 |
OPTIMAL VELOCITY FIELD FOR LAMINAR CONVECTIVE HEAT TRANSFER IN RECTANGULAR CHANNEL |
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| SONG Wei-Ming MENG Jian LI Zhi-Xin.OPTIMAL VELOCITY FIELD FOR LAMINAR CONVECTIVE HEAT TRANSFER IN RECTANGULAR CHANNEL[J].Journal of Engineering Thermophysics,2011(1):133-136. |
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| Authors: | SONG Wei-Ming MENG Jian LI Zhi-Xin |
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| Institution: | SONG Wei-Ming MENG Jian LI Zhi-Xin (Key Laboratory for Thermal Science and Power Engineering of Ministry of Education School of Aerospace,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The optimal velocity field for a given viscous dissipation was numerically obtained by solving the field synergy equation for laminar convective heat transfer in rectangular channel.The results show that the optimal velocity field is a multiple longitudinal vortex flow,which significantly enhances the heat transfer with lower flow resistance increment.The multiple longitudinal vortex flow close to the optimal velocity field could be generated by the discrete double inclined ribs arranged in the rectangular ... |
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| Keywords: | extremum entransy dissipation principle longitudinal vortex discrete double inclined ribs |
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