原子能科学技术2016，Vol.50Issue(12)：2181-2187,7.DOI:10.7538/yzk.2016.50.12.2181
竖直圆管内超临界流体混合对流传热特性理论分析
Theoretical Analysis of Mixed Convective Heat Transfer Characteristic for Supercritical Fluid Flowing in Vertical Bare Tube
摘要
Abstract
T he theoretical analysis about the influence of buoyancy effect caused by den‐sity variation and flow acceleration effect on forced convective heat transfer to supercriti‐cal fluid was carried out . The analysis results show that buoyancy and acceleration effects may change the turbulent heat and mass transfer through reducing or enhancing the shear stress magnitude at the verge of boundary layer ,and make a big difference to supercritical fluid heat transfer at certain conditions .Often buoyancy effect is obvious near the entrance or upstream ,w hile acceleration at w here the bulk temperature is just beyond the pseudo‐critical temperature .Compared with experimental result ,it’s found that the buoyancy and acceleration factors are able to predict the local heat transfer char‐acteristics in the pseudo‐critical zone suitably .关键词
超临界二氧化碳/混合对流传热/浮升力效应/流动加速效应/拟临界区Key words
supercritical carbon dioxide/mixed convective heat transfer/buoyancy effect/flow acceleration effect/pseudo-critical regime分类
能源科技引用本文复制引用
刘生晖,黄彦平,刘光旭,王俊峰,昝元锋,郎雪梅,黄军..竖直圆管内超临界流体混合对流传热特性理论分析[J].原子能科学技术,2016,50(12):2181-2187,7.基金项目
国家杰出青年科学基金资助项目 （）
