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首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Heat Transfer in a Reciprocating Thermosyphon Fitted with Staggered Transverse Ribs
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Heat Transfer in a Reciprocating Thermosyphon Fitted with Staggered Transverse Ribs

机译：装有交错横肋的往复式热虹吸管中的热传递

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摘要

This paper describes an experimental investigation of heat transfer in a reciprocating antigravity open thermosyphon. The thermosyphon tube is square in cross section, and two opposite walls are roughened with staggered transverse ribs. This flow/heat-transfer system has relevance, as a fundamental study, to the shaker-cooling system for the pistons of reciprocating engines. A series of experiments are undertaken to demonstrate the complex interaction that exists between inertial, reciprocating, and buoyancy forces on the performance of this form of cooling system. It is shown that reciprocation of the system significantly improves heat transfer in comparison with the stationary antigravity thermosyphon performance. The buoyancy effects from gravity and reciprocation improve heat transfer. Reductions in the effectiveness of buoyancy forces are produced when the relative strengths of inertial or/and pulsating forces increase. In the extrapolated case of zero buoyancy, it was found that the local heat transfer along the thermosyphon tube was reduced in comparison to the static case at relatively low levels of reciprocation frequency. As the reciprocation frequency was increased, this effect was reversed and heat transfer improved in comparison with the stationary case.
机译：本文介绍了往复式反重力开放式热虹吸管中传热的实验研究。热虹吸管的横截面为正方形，两个相对的壁均采用交错的横向肋进行了粗糙处理。作为基础研究，这种流动/传热系统与往复式发动机活塞的振动筛冷却系统相关。进行了一系列实验，以证明惯性力，往复力和浮力之间存在复杂的相互作用，从而影响这种冷却系统的性能。结果表明，与固定的反重力热虹吸性能相比，系统的往复运动显着改善了热传递。重力和往复运动产生的浮力可改善热传递。当惯性力和/或脉动力的相对强度增加时，浮力的有效性就会降低。在零浮力的推断情况下，发现在相对较低的往复频率水平下，与静态情况相比，沿热虹吸管的局部传热减少了。与往复运动的频率相比，随着往复频率的增加，这种作用被逆转，并且与固定情况相比，传热得到了改善。

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