矩形小流道受限汽泡流及环状流区域沸腾传热模型研究
Nuclear Power Engineering（2021）
Abstract
为探析矩形小流道受限汽泡流及环状流区域沸腾传热机理,本文基于理论推导,从受限汽泡典型特征出发,探明了受限汽泡流几何结构;基于时间加权平均方法,确定了受限汽泡区及液塞区在受限汽泡流所占权重;基于一维导热等理论和积分方法,建立了液膜蒸发换热系数计算方法,并将其应用于环状流区域.综合上述方法,提出了一种新的受限汽泡流及环状流区域沸腾传热模型——双区域模型,该模型适用范围为:雷诺数(Re)为2300～5373,普朗特数(Pr)为2.75～19.8,毛细数(Ca)为0.000835～0.002767.
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Key words
boiling heat transfer model,confined bubble flow,heat transfer,annular flow,mini-channel
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