| 多纵向涡对管内湍流换热特性影响的数值分析 |
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| 引用本文： | 孟继安,梁新刚,李志信.多纵向涡对管内湍流换热特性影响的数值分析[J].工程热物理学报,2005,26(3):498-500. |
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| 作者姓名： | 孟继安 梁新刚 李志信 |
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| 作者单位： | 清华大学航天航空学院,北京,100084;清华大学航天航空学院,北京,100084;清华大学航天航空学院,北京,100084 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 对多纵向涡对管内湍流换热和流阻特性进行了数值分析。结果表明,多纵向涡可明显强化管内湍流换热,其流阻增加与换热增强相当。在计算范围内管内湍流换热时纵向涡对越多强化效果越好,多纵向涡的尺度应与热边界层厚度相当。同时,管内多纵向涡沿轴向还具有不易衰减的特性,这为多纵向涡的应用提供了方便。
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| 关 键 词： | 湍流换热 场协同理论 多纵向涡 强化传热 |
| 文章编号： | 0253-231X(2005)03-0498-03 |
| 修稿时间： | 2004年12月20 |
NUMERICAL ANALYSIS ON THE CHARACTERISTIC OF TURBULENT HEAT TRANSFER WITH MULTI LONGITUDINAL VORTEXES IN TUBE |
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| MENG Ji-An,LIANG Xin-gang,LI Zhi-Xin.NUMERICAL ANALYSIS ON THE CHARACTERISTIC OF TURBULENT HEAT TRANSFER WITH MULTI LONGITUDINAL VORTEXES IN TUBE[J].Journal of Engineering Thermophysics,2005,26(3):498-500. |
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| Authors: | MENG Ji-An LIANG Xin-gang LI Zhi-Xin |
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| Abstract: | The characteristic of turbulent heat transfer and flow resistance with multi-longitudinal vortexes in tube is numerically analyzed. The results show that the multi-longitudinal vortexes could enhance the turbulent heat transfer in tube markedly and the flow resistance increase is similar to heat transfer enhancement. The more the multi-longitudinal vortexes are, the better the enhancement in the range of calculation. The dimension of the multi-longitudinal vortexes should be equivalent to the thickness of the heat boundary layer. Meanwhile, the multi-longitudinal vortexes are not easy to attenuate in the axis direction, which gives convenience for the application of multi-longitudinal vortexes. |
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| Keywords: | turbulent heat transfer field synergy theory multi-longitudinal vortex enhanced heat transfer |
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