高校化学工程学报2024，Vol.38Issue(6)：839-851,13.DOI:10.3969/j.issn.1003-9015.2024.06.001
多孔针肋阵列结构流动沸腾换热特性实验研究
Experimental study on flow boiling heat transfer characteristics of porous pin-finned array structures
摘要
Abstract
The instability of pressure and temperature in flow boiling could easily lead to earlier reaching of drying limit of microchannels.A comparative study on supercooled flow boiling heat transfer experiments for sintered pin-finned array structures was performed using deionized water as the working fluid.The pin-finned structure was sintered with 30 μm,90 μm and 150 μm spherical copper powder,and the inlet water temperature was maintained at 60℃.The results show that particle size has a significant effect on heat transfer coefficient and critical heat flux qCHF of flow boiling in porous microchannels.The PF-150 sample showed the lowest wall superheat at high heat fluxes at a mass flux of 52 kg·m-2·s-1,and its qCHF reached 134 W·cm-2.The visualization results show that the larger particle size samples presented lower pressure amplitude and more-ordered pressure fluctuation,which improves the boiling heat transfer performance of the pin-finned array.Increasing mass flux can move the wet-drought boundary backwards to ensure adequate liquid supply in the rear part,and greatly reduce the instability of flow boiling.The results indicate that the sintered pin-finned array has great potential in improving flow boiling performance.关键词
针肋/烧结/流动沸腾/两相流Key words
pin-finned array/sintering/flow boiling/two-phase flow分类
能源科技引用本文复制引用
黄俊,张东辉,冯磊,徐健..多孔针肋阵列结构流动沸腾换热特性实验研究[J].高校化学工程学报,2024,38(6):839-851,13.基金项目
科技部国际合作基金项目(G2022014065L). （G2022014065L）
