高Ra数条件下封闭空间内换热的实验研究

来源 :工程热物理学报 | 被引量 : 0次 | 上传用户:linco87
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本文对高宽比等于1的大尺寸封闭空间实验台用水作为对象进行了实验研究,获得了急需的高Ra数条件下封闭空间内换热的实验数据。文章分析了现行文献整理实验结果的弊病,探索用新的指导思想来整理实验数据。改变沿用夹层宽度的特性尺度而用换热面高度为特性尺度是一个合理的改进。分别整理冷、热换热面单壁的换热关联式是另一种新的探索。它将有利于揭示封闭腔内换热的内在机理,值得进一步研究。 In this paper, large size closed space test bed with aspect ratio equal to 1 was studied by using water as experimental object. The experimental data of heat exchange in closed space with high Ra number was obtained. The article analyzes the shortcomings of the current literature collation experiment results and explores the use of new guidelines to collate the experimental data. It is a reasonable improvement to change the characteristic scale of the sandwich width and to use the height of the heat exchange surface as the characteristic scale. Finishing the heat exchange correlation of the single wall of cold and hot heat exchange surfaces separately is another new exploration. It will be helpful to reveal the internal mechanism of heat exchange in closed cavity, which deserves further study.
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