Transient Process Analysis of Oscillating Motion in Oscillating Heat Pipes

Roberto Nunez, Hongbin Ma
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Abstract

During the start-up phase, oscillating heat pipes exhibit a transient process in which the working fluid moves erratically until a steady-state oscillatory flow is attained. Understanding the transient process is important to predict how long it takes an oscillating heat pipe to reach normal operation and realize its heat transfer potential after it is started. In this paper, we perform a theoretical study of the transient process of oscillating heat pipes. Based on a one-dimensional mathematical model, we obtain an analytic solution that allows us to predict transient process characteristics of oscillating motions in an oscillating heat pipe, as well as the impact that different design and operating parameters have on this transient process.
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摆动热管中摆动运动的瞬态过程分析
在启动阶段,振荡热管会出现一个瞬态过程,工作流体会不规则地运动,直到达到稳态振荡流。了解瞬态过程对于预测振荡热管在启动后需要多长时间才能达到正常运行状态并实现其传热潜力非常重要。本文对振荡热管的瞬态过程进行了理论研究。基于一维数学模型,我们得到了一个解析解,从而可以预测振荡热管中振荡运动的瞬态过程特征,以及不同设计和运行参数对这一瞬态过程的影响。
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