江苏大学学报（自然科学版）2025，Vol.46Issue(4)：417-423,7.DOI:10.3969/j.issn.1671-7775.2025.04.007
波形微通道内HFE-7100的流动沸腾换热特性
Flow boiling heat transfer characteristics of HFE-7100 in wavy microchannels
摘要
Abstract
To reduce the temperature of heating wall and improve the uniformity of temperature distribution,the flow boiling heat transfer process of HFE-7100 in the wavy microchannel was numerically simulated,and the effects of microchannel structure and densification methods on the flow boiling characteristics were discussed.The results show that when the waviness throughout the whole flow direction is densified with increasing the ratio of wave amplitude to wave pitch from 0.04 to 0.08,the equivalent diameter of bubble at the outlet of microchannel is decreased to some extent,and the segmental annular flow is also suppressed.However,the pressure loss between the outlet and inlet of microchannel is increased significantly with the maximum increasing up to 140.54％.Increasing the waviness of the upstream,midstream or downstream in the microchannel can effectively inhibit the segmental annular flow from occurring at the outlet section and reduce the heating wall temperature for improving the temperature distribution uniformity of heating wall.The comparison illuminates that increasing the downstream waviness can more significantly reduce the bubble growth rate.The heating wall temperature and distribution can be effectively controlled as well,which is equivalent to that of the whole densified microchannel.However,the pressure loss between the outlet and inlet can be reduced by 34.23％.Increasing the downstream waviness in the wavy microchannel is preferable method for improving the flow boiling heat transfer characteristics.关键词
波形微通道/流动沸腾/汽泡/汽液两相流/壁温Key words
wavy microchannel/flow boiling/bubble/vapor liquid two-phase flow/wall temperature分类
能源科技引用本文复制引用
王迎慧,龚莹,王耀..波形微通道内HFE-7100的流动沸腾换热特性[J].江苏大学学报（自然科学版）,2025,46(4):417-423,7.基金项目
国家自然科学基金资助项目(52276067) （52276067）
