| 矩形空腔内多个离散热源自然对流的数值分析 |
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| 引用本文： | 陈礼.矩形空腔内多个离散热源自然对流的数值分析[J].重庆大学学报(自然科学版),1992(4). |
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| 作者姓名： | 陈礼 |
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| 作者单位： | 重庆大学热力工程系 |
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| 摘 要： | 用SIMPLER算法,数值分析了顶部散热的矩形空腔内一侧竖壁上均匀放置5个离散热源的自然对流传热,探索了瑞利数和空腔高宽比对流动和传热的影响。分析指出:空腔中心存在一个近似等温区:相同热负荷下随着宽度的增加热源表面局部换热系数增大、但冷源平均换热系数却因冷源平均热流密度的减小而降低。数值计算的结果和实验值吻合得很好。
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| 关 键 词： | 自然对流/封闭空腔 离散热源 数值研究 |
NUMERICAL INVESTIGATION ON NATURAL CONVECTION IN AN ENCLOSURE WITH DISCRETE HEAT SOURCES |
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| Chen Li.NUMERICAL INVESTIGATION ON NATURAL CONVECTION IN AN ENCLOSURE WITH DISCRETE HEAT SOURCES[J].Journal of Chongqing University(Natural Science Edition),1992(4). |
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| Authors: | Chen Li |
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| Abstract: | SIMPLER method is used to analyze numerically the effect of aspect ratio and
Ra on flow pattern and heat transfer of natural convection from five discrete heat sources cooled by
the top isothermal heat sink. The results show that an approximate isothermal segion exists in the core of enclosure .and that with the increase of enclosure width the local heat transfer coefficient on the surface of heat source increases .however. the average heal transfer coefficient based on cooling area decreases. The numerical work matches results from experiment very well. |
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| Keywords: | natural convection/ enclosure discrete heat source numerical investigation |
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