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首页> 外文期刊>International Journal of Heat and Mass Transfer >Length effect on entrainment limit of large-L/D vertical heat pipe
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Length effect on entrainment limit of large-L/D vertical heat pipe

机译：长度对大型L / D垂直热管夹带极限的影响

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Heat pipes, which are heat-transfer devices of high thermal conductance, have been studied intensively because of their applicability and efficiency. However, only a small number of studies have been conducted on relatively long heat pipes. Here, the thermal hydraulic characteristics of a long heat pipe are studied. In particular, the thermal performance of the heat pipe and the entrainment limit, one of the important design parameters, are examined, so as to determine their sensitivities to the length-to-inner-diameter (L/D) ratio. Experiments are conducted to measure the heat removal performance and limitations of the heat pipe for various length scales. It is found that the heat-pipe performance exhibits a similar trend for various L/D, but with differing values. It is also found that the L/D effect on the entrainment limit for a large-L/D heat pipe differs significantly from the predictions of conventional correlations. Therefore, in order to develop a practical passive heat-pipe-based heat-removal device, an entrainment limit expression incorporating L/D correction is required.
机译：作为高导热率的传热装置的热管，由于其适用性和效率而被深入研究。然而，仅对相对较长的热管进行了少量研究。在这里，研究了长热管的热工水力特性。特别地，检查热管的热性能和重要的设计参数之一的夹带极限，以确定它们对长度/内径（L / D）比的敏感性。进行了实验，以测量各种长度范围内的散热性能和热管的局限性。发现对于各种L / D，热管性能表现出相似的趋势，但是具有不同的值。还发现，L / D对大L / D热管的夹带极限的影响与传统相关性的预测有很大不同。因此，为了开发实用的基于被动热管的排热装置，需要结合了L / D校正的夹带极限表达式。

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