摘要
以水为工质，对底部封闭竖直狭窄矩形通道的沸腾临界热流密度进行了测定和检讨。对其流动状态和临界热流密度发生位置进行了观察。通过与常用的底部封闭竖直通道的临界热流密度的预测关联式比较，发现底部封闭圆管的预测关联式很难应用到矩形通道上；而使用传热当量直径，底部封闭圆套管道的预测关联式可在±３０％的精度范围内对底部封闭狭窄矩形通道的临界热流密度进行预测。
This paper is to investigate and discuss the critical heat flux (CHF) during natural convection boiling in narrow vertical rectangular channels with closed bottoms, which working fluid is water. The flow patterns and positions of CHF were observed. By comparing predicting CHF correlations, it is found that it is difficult to apply predicting correlations obtained from circle tubes, but the Katto' correlation with the heated equivalent diameter from the annuli could predict the CHF with an accuracy of ±30% i...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2001年第S1期44-46,共3页
Journal of Engineering Thermophysics
关键词
临界热流密度
狭窄矩形通道
底部封闭
自然对流
critical heat flux
narrow rectangular channel
closed bottom
natural convection
