空间科学学报2018，Vol.38Issue(3)：368-372,5.DOI:10.11728/cjss2018.03.368
微重力下三角形微通道内冷凝换热分析
Analysis of Condensation Heat Transfer in Curved Triangle Microchannel under Microgravity
摘要
Abstract
Numerical simulations of condensation heat transfer in triangle microchannels are presented.The model is established on the Volume of Fluid (VOF) approach and the user-defined routines which includes heat transfer at the vapor-liquid interface and latent heat.The predictive accuracy of the numerical model is assessed by comparing the heat transfer coefficient with the available empirical correlations in the literature.The influence of gravity and surface tension on the liquid-vapor interface distribution and heat transfer performance are analyzed.No obvious effect of the gravity is observed in the liquid-vapor interface distribution and the average cross sectional heat transfer coefficient.Surface tension,which plays a dominate role during the condensation in non-circular microchannels,leading to reduction of the condensate film thickness at the sides of the channel and accumulation of the condensate at the corners of the channel,giving rise to smaller thermal resistance and better heat transfer performance.关键词
微重力/微通道/冷凝/传热/VOF模型Key words
Microgravity/Microchannel/Condensation/Heat transfer/VOF model分类
航空航天引用本文复制引用
雷雨川,陈振乾..微重力下三角形微通道内冷凝换热分析[J].空间科学学报,2018,38(3):368-372,5.基金项目
载人航天工程空间应用系统天舟一号货运飞船科学实验项目(TZYY08001),国家自然科学基金项目(51606037)和江苏省自然科学基金项目(BK20160687)共同资助 （TZYY08001）
