低质量流速绝热管内截面平均空泡率实验研究  

Experimental study of average void fraction with low mass flux in adiabatic tube

作　　者：孙奇[1] 郗昭[1] 杨瑞昌[2] 赵华[1] 王小军[1] 

机构地区：[1]中国核动力研究设计院空泡物理和自然循环重点实验室,成都610041 [2]清华大学热能工程系,北京100084

出　　处：《核技术》2005年第8期644-648,共5页Nuclear Techniques

基　　金：国家自然科学基金项目(59995460-1);核工业科学基金项目(Y7100E5101)资助

摘　　要：汽液两相流空泡率实验与计算方法研究对于反应堆自然循环及事故分析具有重要意义,然而现有研究主要以高质量流速工况为主,已有的空泡率公式预测结果在低质量流速条件下也存在较大差异。为此,本文以单探头光学探针为主要测量手段,进行了低质量流速绝热工况空泡率实验研究,截面平均空泡率根据探针测量得出的局部空泡率在流道截面上积分计算得出。实验数据与已有空泡率计算公式进行了比较,表明低质量流速工况下多数公式预测结果偏高,而Chexaletal.、GE-Ramp以及Dix公式可得出非常满意的预测结果。综合Vijayan的研究结果,本文建议低质量流速空泡率计算中采用Chexaletal.的公式。The experimental and predictive study of void fraction is very important for the natural circulation and accident analysis in nuclear reactors. However, most of the researches on void fraction were carried out with high mass flux, and the predictions of existing void fraction correlations are quite different in low-flow two-phase flow.Void fraction with low mass flux in adiabatic tube is investigated using single-sensor optical probe in this paper. And then average void fraction is obtained through the integral calculation of local void fraction in the cross-section. The comparisons of existing void fraction correlations with low mass flux experimental data show that most of the correlations overestimate the experimental data, and the predictions of Chexal et al., Dix and GE-Ramp correlations fit the data quite well. Chexal et al. correlation is therefore suggested for the prediction of void fraction with low mass flux two-phase flow according to Vijayan＇s work.

关 键 词：两相流 空泡率 漂移流模型 光学探针 

分 类 号：TK123[动力工程及工程热物理—工程热物理] O359.1[动力工程及工程热物理—热能工程]