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首页> 外文期刊>Journal of Heat Transfer >Rotated G-Shaped Insertion to Suppress Natural Convection Inside a Square Enclosure That Has Conductive Walls
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Rotated G-Shaped Insertion to Suppress Natural Convection Inside a Square Enclosure That Has Conductive Walls

机译：旋转的G形插入物可抑制具有导电壁的方形外壳内的自然对流

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摘要

This paper presents the results of a numerical study for using a simple insertion to reduce the heat transfer through an air-filled square cavity when subjected to a temperature gradient. The insertion is a rectangular sheet folded in a special way to produce the shape of a rotated letter G. The insertion is thermally conductive, and in perfect contact with the walls of the cavity. The cavity has thick conductive walls. The two outer vertical sides of the cavity are isothermal, and the two horizontal sides are adiabatic. The solution of continuity, momentum, and energy equations for this system yields the isotherms, streamlines, and heat flux transported across the cavity. The insertion suppresses the convection currents inside the cavity and hence reduces the heat transfer rate across them. The analysis shows the effect of the insertion dimensions and thermal properties on the heat transfer rate through the cavity. This paper also presents the results of using this insertion inside the holes of an ordinary building brick. The insertion is an easy tool to manufacture and a simple device to use for reducing the heat transfer through the blocks. The G insertion reduces the heat flux by 27-42%.
机译：本文介绍了一个数值研究的结果，该研究使用一个简单的插入物来降低温度梯度下通过空气填充的方腔的传热。插入物是以特殊方式折叠的矩形薄片，以产生旋转的字母G的形状。插入物是导热的，并且与空腔的壁完美接触。空腔具有厚的导电壁。空腔的两个外部垂直侧是等温的，两个水平侧是绝热的。该系统的连续性，动量和能量方程式的解决方案产生了等温线，流线和在腔体内传输的热通量。插入抑制了空腔内部的对流，因此降低了穿过空腔的对流速度。分析显示了插入尺寸和热性能对通过腔体的传热速率的影响。本文还介绍了在普通建筑砖的孔内使用此插入物的结果。插入件是易于制造的工具，并且是用于减少通过块的热传递的简单装置。 G的插入使热通量减少了27-42％。

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