| 混合长度理论的改进及其在变物性传热中的应用 |
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| 引用本文： | 毛宇飞,白博峰,郭烈锦.混合长度理论的改进及其在变物性传热中的应用[J].工程热物理学报,2011(1):58-62. |
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| 作者姓名： | 毛宇飞 白博峰 郭烈锦 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室; |
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| 基金项目： | 国家自然科学基金重点项目(No.50536020); 创新群体项目(No.50821064) |
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| 摘 要： | 根据边界层理论,对管内变物性湍流强制对流换热控制方程组进行简化;并通过考虑湍流输运中的密度脉动,对传统的混合长度湍流模型进行改进,使之能同时适用于常物性流动和变物性流动.基于该计算模型,对管内超临界压力水湍流对流换热特性进行了数值模拟.计算结果表明,本文的计算模型能正确地反映出超临界工况下的变物性对流换热特征,换热系数...
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| 关 键 词： | 变物性 超临界 混合长度 对流换热 |
IMPROVEMENT OF THE MIXING LENGTH THEORY AND ITS APPLICATION TO VARIABLE-PROPERTY HEAT TRANSFER |
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| MAO Yu-Fei BAI Bo-Feng GUO Lie-Jin.IMPROVEMENT OF THE MIXING LENGTH THEORY AND ITS APPLICATION TO VARIABLE-PROPERTY HEAT TRANSFER[J].Journal of Engineering Thermophysics,2011(1):58-62. |
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| Authors: | MAO Yu-Fei BAI Bo-Feng GUO Lie-Jin |
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| Institution: | MAO Yu-Fei BAI Bo-Feng GUO Lie-Jin (State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | The governing equations for variable-property turbulent forced convection heat transfer in tubes were simplified according to the boundary-layer theory.And an improved mixing length turbulence model was developed by introducing the effect of density fluctuations into the equations of turbulent transport,which can be applied to both constant-property and variable-property flows.Based on the proposed calculation models above,numerical simulations were carried out to investigate the turbulent convective heat t... |
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| Keywords: | variable-property supercritical mixing length convective heat transfer |
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