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高热流密度下微纳表面流动沸腾传热特性
subcooled flow boiling heat transfer for hybrid micro/nano-structured surface with high heat flux incidence
投稿时间:2023-04-14  修订日期:2023-06-01
DOI:
中文关键词:  微纳表面  过冷流动沸腾  传热系数;关系式
英文关键词:hybrid micro/nano-structured surfaces, subcooled flow boiling, heat transfer coefficient, correlation
基金项目:中国科学院合肥大科学中心协同创新培育(NO. 2022HSC-CIP021);国家磁约束聚变专项项目 (NO. 2015GB121007);合肥物质科技中心创新项目(NO. 2018ZYFX001)
作者单位邮编
黄桓淳 中国科学技术大学材料力学行为和设计重点实验室 230026
黄生洪 中国科学技术大学 230026
周展如* 中国科学技术大学材料力学行为和设计重点实验室 230026
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中文摘要:
      微纳结构处理表面强化传热技术在高热流密度的电子设备和托卡马克偏滤器等冷却系统中有很大的应用潜能。制备了三种不同结构微纳表面,并对微纳表面水过冷流动沸腾开展了实验研究,实验条件为压力0.5–1.5 MPa,流速为1–5m/s,入口过冷度为30–50℃且热流密度3.4–13.1MW/m2。基于实验得到的530组过冷流动沸腾传热实验数据,评估了现有25个流动沸腾传热系数关系式,表现最好的公式是Kutateladz公式,其平均绝对误差为22.2%。评估结果为微纳表面的应用提供了有益参考。
英文摘要:
      The subcooled flow boiling enhanced heat transfer technology of water on hybrid micro/nano-structured surfaces has great potentiality for applications in high heat flux cooling systems such as electronic devices and tokamak divertors. Three different structures of hybrid micro/nano-structured surface were prepared and experimental studies on water subcooling flow boiling were carried out. Total 530 experimental data points of subcooled flow boiling heat transfer of water on hybrid micro/nano-structured surfaces using vacuum brazing technique were obtained, with the parameter range of heat flux from 3.4 to 13.1 MW/m2, pressure from 0.5 to 1.5 MPa, liquid velocity from 1 to 5 m/s, inlet temperature from 303.15 to 323.15 K. The measurements of the heat transfer coefficient with different micro/nano-structured surfaces were compared with the existing 25 correlations. The correlation of Kutateladz predicted best with a MAD of 22.2%. The results of the evaluation provided a useful reference for the application of hybrid micro/nano-structured surfaces.
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