作　　者： ; ;

机构地区： 西安交通大学

出　　处： 《核科学与工程》 1994年第1期21-27,共7页

摘　　要： 对垂直管内汽水两相下降流动和上升流动时的沸腾传热特性进行了理论和试验研究.推导得到了两种流动情况下的汽泡脱离半径,分析讨论了液膜厚度及流速,从而对试验结果作出了理论解释.研究结果表明,在临界压力以下,上升流的传热恶化比下降流严重;在超临界压力下,上升流传热特性好于下降流. The characteristics of boiling heat transfer of steam - water two - phase downflow and up-flow in vertical tube are theoretically and experimentally studies in this paper. The radius of steam bubble seperating from tube wall is derived. And the liquid film thickness and flow speed are discussed. The results of experiments and theoretical analyses show that the heat trarsfer characteristics of downflow are better at subcritical pressure, but worse at supercritical pressure than those of upflow.

关 键 词： 二相流动 沸腾 传热 垂直管

领　　域： [核科学技术]