作　　者： ; ; ; ;

机构地区： 西安交通大学

出　　处： 《核动力工程》 1995年第3期246-252,共7页

摘　　要： 当压水堆的热腿或冷腿的水平段发生小破口失水事故时，需考虑破口方位对破口临界流量及其它热工水力特性的影响。破口位于水平管顶部时，存在一临界液位高度ｈ，在此液位高度，汽液界面上的液体开始被汽体夹带而进入破口。本文提出了确定该临界液位的数学模型，临界液位高度与破口直径之比ｈ／ｄ由两个无量纲积分方程所制约。ｈ／ｄ的计算结果与已有实验数据及其它作者经验关系式预测值的比较表明，在相同的氟鲁德（Ｆｒ）数下，顶部破口较侧部破口能夹带更远处的液体． When small break at the pressurized water reactor hot or cold leg horizontal pipe occurs, the effects of break orientation on the critical mass flow rate and other thermal hydraulic characteristics should be considered. If the break is located at the top of the horizontal pipe,a critical liquid height exists,the liquid on the surface of the horizontal interface begins to be entrained and flow through the break under this critical liquid height.This paper presents a numerical model to determine the critical liquid height,the ratio of the critical liquid height to the break diameter h /d is characterized by two non-dimensional integration equations.Comparisons of this predicted h /d with available experiment data and the predicted results based upon other correlations are also given.It is indicated that liquid entrainment begins to occur more easily for top break than that for side break.

关 键 词： 水平管 液体夹带 数学模型 压水堆

领　　域： [核科学技术]