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Effects of Inner Rotating Horizontal Cylinder on Heat Transfer in a Differentially Heated Enclosure

机译：内旋转卧式气缸对差热外壳中传热的影响

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摘要

The effects of an inner rotating horizontal cylinder on heat transfer in a differentially heated enclosure were investigated experimentally. The aspect ratio of the enclosure height/width was 1:1 in these experiments. A polypropylene cylinder was installed horizontally at the center of a square enclosure and rotated at various speeds. The working fluid was purified water. The surface temperature of the rotating cylinder was measured with a telemetry system; the flow pattern was sketched by a visualization experiment using aluminum powder. It was shown that the rotating cylinder suppresses the heat-transfer rate of the enclosure in the low rotating-speed range due to the interference between natural and forced convections. However, marked heat-transfer enhancement can be obtained in the high rotating-speed range. The rotating cylinder used here is useful for thermal regulation over a wide range of heat-transfer rates.
机译：实验研究了内部旋转卧式气缸对差温加热箱内传热的影响。在这些实验中，外壳高度/宽度的纵横比为1：1。将聚丙烯圆筒水平安装在方形外壳的中心，并以各种速度旋转。工作流体是纯净水。用遥测系统测量旋转圆筒的表面温度。用铝粉通过可视化实验勾勒出流动模式。结果表明，由于自然对流和强制对流之间的干扰，旋转圆柱体在低转速范围内抑制了外壳的传热率。但是，在高转速范围内可以获得明显的传热增强。此处使用的旋转气缸可用于多种传热速率的热调节。

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