Effect of Flow Resistance of Floating-type Check Valves On Heat Transfer Characteristics of an Oscillating Heat Pipe

IF 2.8 4区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Heat Transfer-transactions of The Asme Pub Date : 2023-06-20 DOI:10.1115/1.4062783

M. Ando, Atsushi Okamoto, H. Nagai

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Abstract

An Oscillating Heat Pipe with Check Valves (CVOHP) is an attractive heat transfer device for future spacecraft with considerable heat dissipation and ground applications. This study aims to clarify the effect of the flow resistance of floating-type check valves on the heat transfer characteristics of the CVOHP using a one-dimensional slug flow model, which simulates the five-turn CVOHP used in the on-orbit experiment by the authors. The numerical simulations were conducted for different flow resistances, positions, and numbers of check valves. The results showed that the thermal resistance of the CVOHP increases with the flow resistance of the check valves, while there is no significant effect on the startup characteristics. The thermal resistance increased by more than 100 % in the worst case, and the recommended flow resistance coefficient of the check valve was below 100 in this study for high thermal performance. The thermal resistance increases with an increasing number of high-resistance check valves but is less affected by the position of the valve. Additionally, the higher the heat input, the greater the effect of the flow resistance of the check valves. According to the findings in this study, it is necessary to control the flow resistance of the floating-type check valves at a low level for the high thermal performance of a CVOHP.

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浮式止回阀流动阻力对振荡热管传热特性的影响

带有单向阀的振荡热管(CVOHP)是一种有吸引力的传热装置，用于未来的航天器，具有相当大的散热和地面应用。本文采用一维段塞流模型，模拟在轨实验中使用的5转CVOHP，阐明浮动式止回阀流动阻力对CVOHP换热特性的影响。对止回阀的不同流动阻力、位置和数量进行了数值模拟。结果表明:CVOHP的热阻随止回阀流量阻力的增大而增大，但对其启动特性影响不显著;在最坏的情况下，热阻增加了100%以上，为了获得较高的热性能，本研究建议单向阀的流阻系数在100以下。热阻随着高阻止回阀数量的增加而增加，但受阀门位置的影响较小。此外，热量输入越高，止回阀流动阻力的影响越大。研究结果表明，为了提高CVOHP的热工性能，必须将浮式止回阀的流动阻力控制在较低的水平。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Heat Transfer-transactions of The Asme 工程技术-工程：机械

自引率

0.00%

发文量

182

审稿时长

4.7 months

期刊介绍： Topical areas including, but not limited to: Biological heat and mass transfer; Combustion and reactive flows; Conduction; Electronic and photonic cooling; Evaporation, boiling, and condensation; Experimental techniques; Forced convection; Heat exchanger fundamentals; Heat transfer enhancement; Combined heat and mass transfer; Heat transfer in manufacturing; Jets, wakes, and impingement cooling; Melting and solidification; Microscale and nanoscale heat and mass transfer; Natural and mixed convection; Porous media; Radiative heat transfer; Thermal systems; Two-phase flow and heat transfer. Such topical areas may be seen in: Aerospace; The environment; Gas turbines; Biotechnology; Electronic and photonic processes and equipment; Energy systems, Fire and combustion, heat pipes, manufacturing and materials processing, low temperature and arctic region heat transfer; Refrigeration and air conditioning; Homeland security systems; Multi-phase processes; Microscale and nanoscale devices and processes.