Heat Transfer by Natural Convection Across Vertical and Inclined Air Layers
Heat Transfer by Natural Convection Across Vertical and Inclined Air Layers
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DOI：
10.1115/1.3245075
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发表时间：
1982-02
影响因子：
--
通讯作者：
S. M. Elsherbiny;G. Raithby;K. Hollands
中科院分区：
文献类型：
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作者：
S. M. Elsherbiny;G. Raithby;K. Hollands
本文报道了垂直和倾斜空气层间自然对流换热的测量结果。空气层由不同温度下的平板等温板包围，在边缘周围有一个完全导电的边界(即，在两个平板之间呈现线性温度分布的边界)。据报道，对6个宽高比在5到110之间进行了测量，覆盖了窗户、太阳能集热器等实际感兴趣的范围的一部分。瑞利数在102到2×107的范围内。目前的测量允许宽高比的作用被清楚地定义。此外，还给出了可用于计算垂直或倾斜空气层内热量传递的关联式。
Measurements of the heat transfer by natural convection across vertical and inclined air layers are reported. The air layer is bounded by flat isothermal plates at different temperatures and around the edges by a perfectly conducting boundary (i.e., one that takes on a linear temperature distribution between the two plates). Measurements are reported for six aspect ratios between 5 and 110, covering a portion of the range of practical interest for windows, solar collectors, etc. Rayleigh numbers were in the range 102to 2 × 107. The present measurements permitted the role of aspect ratio to be clearly defined. In addition, correlation equations are presented which allow the heat trnasfer across a vertical or inclined air layer to be calculated.