| 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 |
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| 引用本文： | 刘尧奇,陈听宽,陈学俊.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[J].核科学与工程,1994(1). |
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| 作者姓名： | 刘尧奇 陈听宽 陈学俊 |
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| 作者单位： | 西安交通大学
(刘尧奇，陈听宽)，西安交通大学(陈学俊) |
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| 基金项目： | 国家自然科学基金会资助 |
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| 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.
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| 关 键 词： | 两相流 |
BOILING HEAT TRANSFER CHARACTERISTICS OF STEAM - WATER TWO - PHASE DOWNFLOW AND UPFLOW IN VERTICAL TUBE |
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| LIU YAOQI CHEN TINGKUAN CHEN XUEJUN.BOILING HEAT TRANSFER CHARACTERISTICS OF STEAM - WATER TWO - PHASE DOWNFLOW AND UPFLOW IN VERTICAL TUBE[J].Chinese Journal of Nuclear Science and Engineering,1994(1). |
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| Authors: | LIU YAOQI CHEN TINGKUAN CHEN XUEJUN |
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| Affiliation: | Xi'an Jiaotong University |
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| Abstract: | 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. |
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| Keywords: | two - phase flow |
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