微型重力热管两相非线性振荡行为的实验研究

IF 1.7 4区工程技术 Q3 THERMODYNAMICS

Heat Transfer Research Pub Date : 2024-02-01 DOI:10.1615/heattransres.2024052179

Yu Fawen, Chaoyang Zhang, Tong Li, Yuhang Zhang, Wentao Zheng

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引用次数: 0

摘要

对具有平行矩形通道的铝乙醇微型重力热管中汽液两相的振荡行为进行了实验研究。定性分析了振荡状态下两相的非线性振荡行为和振荡特性。此外，还揭示了管壁温度的非线性振荡特性。此外，还进一步分析了热负荷对温度振荡特性的影响。研究结果表明，在中等热负荷下，以液塞在单通道中随机形成和振荡为特征的单通道独立振荡是典型的两相振荡行为。此外，相邻通道之间液塞振荡的相互作用很小。在高热负荷下，液塞两端的蒸汽压差对液塞的促进作用更大，单通道中液塞振荡与相邻通道间振荡的叠加形成了相邻通道中的干涉振荡。对于相邻通道的干涉振荡，在单通道液塞和相邻通道液塞的耦合侵蚀下，壁面温度会出现高频振幅大、低频振幅小的振荡。随着热负荷的增加，单通道独立振荡的主振频率增加，热负荷增加产生的较大驱动力增强了单通道液塞的振荡，削弱了不同通道液塞的振荡。

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Experimental study on two-phase nonlinear oscillation behavior of miniaturized gravitational heat pipe

An experimental study on oscillation behavior of vapor-liquid two-phase in aluminum ethanol miniaturized gravitational heat pipe with parallel rectangular channel is carried out. The nonlinear oscillation behavior and oscillation characteristics of two-phase in oscillation state are qualitatively analyzed. In addition, the nonlinear oscillation characteristic of the wall temperature is revealed. Furthermore, the influence of heat load on temperature oscillation characteristics is further analyzed. The research shows that the independent oscillation in single channel characterized by the random formation and oscillation of liquid plug in a single channel is the typical oscillation behavior of two-phase under medium heat load. In addition, the interaction on oscillation of liquid plugs between adjacent channels is small. For high heat load, the vapor pressure difference at both ends of the liquid plug has more important role in promoting the liquid plug, the superposition of the liquid plug oscillation in single channel and the oscillation between adjacent channels forms the interference oscillation in adjacent channels. For interference oscillation in adjacent channels, under coupling erosion of the liquid plug in single channel and the liquid plugs in adjacent channels, the wall temperature oscillates with large amplitude at high frequency and small amplitude at low frequency. With increase of heat load, the dominant frequency of oscillation for independent oscillation in single channel increases, and the larger driving force caused by heat load increase enhances the oscillation of liquid plug in single channel and weakens the oscillation of liquid plug in different chann

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来源期刊

Heat Transfer Research 工程技术-热力学

CiteScore

3.10

自引率

23.50%

发文量

102

审稿时长

13.2 months

期刊介绍： Heat Transfer Research (ISSN1064-2285) presents archived theoretical, applied, and experimental papers selected globally. Selected papers from technical conference proceedings and academic laboratory reports are also published. Papers are selected and reviewed by a group of expert associate editors, guided by a distinguished advisory board, and represent the best of current work in the field. Heat Transfer Research is published under an exclusive license to Begell House, Inc., in full compliance with the International Copyright Convention. Subjects covered in Heat Transfer Research encompass the entire field of heat transfer and relevant areas of fluid dynamics, including conduction, convection and radiation, phase change phenomena including boiling and solidification, heat exchanger design and testing, heat transfer in nuclear reactors, mass transfer, geothermal heat recovery, multi-scale heat transfer, heat and mass transfer in alternative energy systems, and thermophysical properties of materials.