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首页> 外文期刊>Energy Conversion & Management >Improved correlations of the thermal-hydraulic performance of large size multi-louvered fin arrays for condensers of high power electronic component cooling by numerical simulation
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Improved correlations of the thermal-hydraulic performance of large size multi-louvered fin arrays for condensers of high power electronic component cooling by numerical simulation

机译：数值模拟改善大功率电子百叶窗冷凝器大型百叶窗翅片阵列热工水力性能的相关性

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摘要

In view of a good thermal performance of the multi-louvered fin arrays, it is intended to introduce the special fin structure into the design of condensers for high power electricity converter cooling on the CRH (China Railway High-speed) trains in order to improve the security of normal running for the high-speed trains. The geometrical size of the multi-louvered fin arrays needed for the high power condensers is relatively larger than that of the conventional louvered fin arrays and the flow state within the large size multi-louvered fin arrays is different as well, with the Reynolds numbers based on the louver pitch over the range of 2850-11,000 in the present study. Flow and heat transfer characteristics of the large size multi-louvered fin arrays with various structural parameters are numerically simulated using Large Eddy Simulation (LES). More reasonable parameters correlated with the thermal-hydraulic performance of the large size multi-louvered fin arrays are identified compared to the conventional characteristic parameters employed in the published work. Finally, improved correlations for the Fanning friction f factor and the Colburn-j factor representing the flow and heat transfer characteristics, respectively, are put forward in terms of the identified parameters with special interval bounds for the condenser design of high power electronic cooling.
机译：鉴于多百叶窗式散热片阵列具有良好的热性能，打算将特殊的散热片结构引入CRH（中国铁路高速）列车上的大功率电力转换器冷却用冷凝器的设计中，以改进高速列车正常运行的安全性。高功率冷凝器所需的多百叶窗式翅片阵列的几何尺寸相对比常规百叶窗式翅片阵列的几何尺寸相对较大，并且大尺寸多百叶窗式翅片阵列内的流动状态也不同，其中基于雷诺数在本研究中，百叶窗音高在2850-11,000范围内。使用大涡模拟（LES）对具有各种结构参数的大型多百叶窗式翅片阵列的流动和传热特性进行了数值模拟。与已发表的工作中使用的常规特征参数相比，可以确定与大型多百叶窗式鳍片阵列的热工液压性能相关的更合理的参数。最后，针对高功率电子冷却器的冷凝器设计，根据确定的参数和特殊的区间界限，分别提出了分别代表流动和传热特性的Fanning摩擦系数f和Colburn-j的改进相关性。

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