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首页> 外文期刊>Journal of Heat Transfer >The Effects of Air Infiltration on a Large Flat Heat Pipe at Horizontal and Vertical Orientations
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The Effects of Air Infiltration on a Large Flat Heat Pipe at Horizontal and Vertical Orientations

机译：水平和垂直方向空气渗透对大型扁平热管的影响

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摘要

In the satellite or energy conversion industries flat heat pipes may be utilized to transfer heat to the thermal sink. In this investigation, a large flat heat pipe, 1.22 mX 0.305 m X0.0127 m, fabricated from 50 mil Monel 400 metal sheets and Monel 400 screens was videographed at horizontal and vertical orientations with an infrared video camera. The heat pipe evaporator section consisted of a 0.305 m X0.305 m area (one heated side only) while the side opposite the heated section was insulated. The remaining area of the heat pipe served as the condenser. In the horizontal orientation the heated section was on the bottom. In the vertical orientation the evaporator was aligned below the condenser. The sequence of photographs depicts heat inputs ranging from 200 W to 800 W, and the effect of air infiltration on heat pipe operation for both orientations. For the horizontal orientation, the air is seen to recede towards the small fill pipe as the heat input is increased. For the vertical orientation, the air and water vapor exhibit a buoyant interaction with the result that the air presence inhibits heat transfer by rendering sections of the condenser surface ineffective. The effects depicted in this paper set the stage for future analytical and experimental work in flat heat pipe operation for both normal and variable conductance modes.
机译：在卫星或能源转换行业中，可以使用扁平热管将热量传递到散热器。在这项研究中，使用红外摄像机在水平和垂直方向上拍摄了由2.5亿Monel 400金属板和Monel 400屏幕制成的1.22 mX 0.305 m X0.0127 m的大型扁平热管。热管蒸发器部分的面积为0.305 m X0.305 m（仅一个受热侧），而与受热部分相对的一侧则被绝缘。热管的其余区域用作冷凝器。在水平方向上，加热部分位于底部。在垂直方向上，蒸发器在冷凝器下方对齐。照片序列描绘了200 W至800 W的热量输入，以及两个方向的空气渗透对热管运行的影响。对于水平方向，随着热量输入的增加，空气会朝着小填充管后退。对于垂直取向，空气和水蒸气表现出浮力相互作用，结果是空气的存在通过使冷凝器表面的各个部分无效而抑制了热传递。本文描述的效果为将来在正常和可变电导模式下扁平热管运行中的分析和实验工作奠定了基础。

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