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首页> 外文期刊>International Journal of Heat and Mass Transfer >Non equilibrium lumped parameter model for Pulsating Heat Pipes: validation in normal and hyper-gravity conditions
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Non equilibrium lumped parameter model for Pulsating Heat Pipes: validation in normal and hyper-gravity conditions

机译：脉动热管的非平衡集总参数模型：在正常和超重力条件下的验证

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摘要

As relatively new and promising members of the wickless heat pipes family, Pulsating Heat Pipes, with their high effective thermal conductivity, construction simplicity, low weight, and potential high power loads may answer the present industry demand of high heat transfer capability, efficient thermal control, flexibility and low cost. Numerous are the attempts to simulate their complex thermal behavior, but none of the existing models is validated for transient operative conditions and under various gravity levels. Thus, a novel lumped parameters model able to compute the steady state as well as the transient performance of PHPs has been developed. It consists of a two-phase separated flow model applicable to a confined operating regime (slug-plug flow). A complete set of balance differential equations accounts for thermal and fluid-dynamic phenomena. The main originalities of this tool lay in the suppression of the standard assumption of saturated vapor plugs as well as in the consequent embedding of heterogeneous and homogeneous phase changes. In addition, an experimental work has been carried out with a 16 turns copper capillary PHP filled with FC-72. Therefore, the model has been validated in several operative conditions and under various gravity levels by comparison with these experimental data both in normal and hyper-gravity conditions showing very good prediction capability.
机译：作为无芯热管家族中相对较新和有前途的成员，脉动热管具有高效的热导率，结构简单，重量轻和潜在的大功率负载的特性，可以满足当前行业对高传热能力，有效热控制的需求，灵活性和低成本。已经进行了许多模拟它们的复杂热行为的尝试，但是对于瞬态操作条件和在各种重力水平下，现有模型均未得到验证。因此，开发了一种能够计算PHP的稳态和瞬态性能的新型集总参数模型。它由两相分离的流量模型组成，适用于受限的工作状态（塞状塞流）。一套完整的平衡微分方程解决了热和流体动力学现象。该工具的主要创新之处在于抑制了饱和蒸气塞的标准假设，并因此嵌入了非均质和均质相变。另外，已经用填充有FC-72的16匝铜毛细管PHP进行了实验工作。因此，通过在正常和超重力条件下与这些实验数据进行比较，该模型已经在几种操作条件下以及在各种重力水平下得到了验证，这些模型显示出非常好的预测能力。

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  • 作者

    Miriam Manzoni; Mauro Mameli; Carlo de Falco; Lucio Araneo; Sauro Filippeschi; Marco Marengo;

  • 作者单位

    Universita degli Studi di Bergamo, Dept. of Eng. and Applied Sciences, Viale Marconi 5, 24044 Dalmine (BG), Italy;

    Universita di Pisa, DESTEC, Largo Lazzarino 2, 56122 Pisa, Italy;

    Politecnico di Milano, MOX, Modeling and Scientific Computing, Dept. of Mathematics, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Politecnico di Milano, Energy Dept., Via Lambruschini 4A, 20158 Milano, Italy;

    Universita di Pisa, DESTEC, Largo Lazzarino 2, 56122 Pisa, Italy;

    Universita degli Studi di Bergamo, Dept. of Eng. and Applied Sciences, Viale Marconi 5, 24044 Dalmine (BG), Italy,University of Brighton, School of Computing, Eng. and Mathematics, Lewes Road, BN2 4GJ Brighton, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pulsating Heat Pipe; Numerical model; Transient mode; Hyper-gravity;

    机译：脉动热管;数值模型瞬态模式超重力;

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