Theoretical Analysis For Condensation Heat Transfer Performance Inside Converging-Shaped Microchannel Under Varying-Gravity Conditions

IF 2.8 4区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Heat Transfer-transactions of The Asme Pub Date : 2023-06-29 DOI:10.1115/1.4062853

Chao Bai, Yan Qiu, Min Wei

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Abstract

The fast increasing heat-dissipation requirements under different working conditions such as varying gravity for aerospace industry is drawing more and more attention. Condensation inside microchannel is proved to be a promising technique to tackle this task. To comprehensively and accurately describe the physical phenomenon, a theoretical method considering both momentum exchange caused by vapor condensation and interface temperature drop is developed in this study. Reliability of our theoretical method is verified with both the Comprehensive Shah Correlation and established data. Condensation heat transfer inside converging-shaped microchannel is investigated and the influences of channel size, refrigerant mass flow rate, gravity variation and converging angle are considered. Converging-shaped microchannel significantly enhances condensation heat transfer, especially for smaller channel with larger refrigerant mass flow rate. Influence of gravity change on condensation performance of vertically-configured microchannel both with converging shape and constant cross-sectional area is small.

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变重力条件下聚敛型微通道内冷凝换热性能的理论分析

航空航天工业在变重力等不同工况下快速增长的散热需求越来越受到人们的重视。微通道内的凝结被证明是解决这一问题的一种很有前途的技术。为了全面准确地描述这一物理现象，本研究提出了一种同时考虑蒸汽冷凝引起的动量交换和界面温度下降的理论方法。综合沙阿相关和实测数据验证了理论方法的可靠性。研究了收敛型微通道内的冷凝换热，考虑了通道尺寸、制冷剂质量流量、重力变化和收敛角等因素对冷凝换热的影响。聚敛型微通道显著增强冷凝换热，特别是对于体积较小、制冷剂质量流量较大的微通道。重力变化对垂直配置的收敛形状和等截面积微通道凝结性能的影响较小。

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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.