| 边界条件局部变化对二维发汗冷却的影响 |
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| 引用本文： | 刘元清,王扬平,姜培学.边界条件局部变化对二维发汗冷却的影响[J].工程热物理学报,2010(4). |
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| 作者姓名： | 刘元清 王扬平 姜培学 |
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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热能工程系; |
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| 基金项目： | 国家自然科学重点基金项目(No.50736003);;973项目(No.2007CB210107) |
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| 摘 要： | 本文通过对发汗冷却的多孔区域进行二维非热平衡数值模拟,研究了多孔介质区域进口处对流换热系数、冷却剂流量局部降低以及多孔介质受热表面热流密度局部增大对青铜、陶瓷两种不同多孔材料的温度场的影响。计算结果表明,冷却剂在进口处与多孔壁面对流换热系数的增大使多孔介质内部趋向于热平衡;热端壁面对流换热系数、冷却剂流量的局部变化对陶瓷多孔壁面在该局部区域的影响要大于青铜多孔壁面,但青铜多孔壁面受影响的区域更大,而冷却剂流量的局部降低对两种材料固体、流体间温差的影响程度基本一致。
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| 关 键 词： | 发汗冷却 二维数值模拟 非热平衡 边界条件 |
THE EFFECTS OF BOUNDARY CONDITION VARIATIONS ON TRANSPIRATION COOLING |
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| LIU Yuan-Qing WANG Yang-Ping JIANG Pei-Xue.THE EFFECTS OF BOUNDARY CONDITION VARIATIONS ON TRANSPIRATION COOLING[J].Journal of Engineering Thermophysics,2010(4). |
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| Authors: | LIU Yuan-Qing WANG Yang-Ping JIANG Pei-Xue |
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| Institution: | Key Laboratory for Thermal Sciences and Power Engineering of Ministry of Education;Department of Thermal Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The influence of local variations of boundary condition on the heat transfer process of transpiration cooling within the ceramic and bronze porous media was analyzed numerically.The Local Thermal Non-Equilibrium(LTNE) model was adopted to predict the temperature filed of the solid and fluid phases within a 2-D computational domain.The calculated results indicate that increasing the heat transfer coefficient on the cold side surface intended to decrease the LTNE effect. In addition,the local heat flux increa... |
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| Keywords: | transpiration cooling 2-D numerical simulation local thermal non-equilibrium boundary conditions |
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