池态沸腾孤立气泡生长数值模拟  

Numerical Simulation of Isolated Bubble Growth in Pool Boiling

作　　者：刘学厅 侯燕[1] Liu Xueting;Hou Yan(College of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing,China)

机构地区：[1]北京石油化工学院机械工程学院,北京

出　　处：《科学技术创新》2024年第23期41-44,共4页Scientific and Technological Innovation

摘　　要：为研究池态沸腾孤立气泡生长过程,该文提出了一种新的相变模型。该相变模型优化了气液界面面积计算方法、提高了相变传质精度并能捕捉池态沸腾中清晰气液界面。采用新相变模型研究了池态沸腾内气泡生长的速度、温度、压强变化。结果表明,池态沸腾中气泡在生长时,气泡内部的速度始终大于气泡外部的速度,而界面温度从过热降至饱和。然而气泡内部的压强呈现先增加后减小,最后出现负压的情况。A new phase change model is proposed to study the growth process of isolated bubbles in pool boiling.The model improves the calculation of the vapor-liquid interface area,improves the accuracy of the phase change mass transfer,and captures the clear vapor-liquid interface in pool boiling.The variations of velocity,temperature and pressure on bubble growth in pool boiling have been investigated using the new phase change model.The results show that the velocity inside the bubble is always greater than the velocity outside the bubble when the bubble grows in pool boiling.The interface temperature subsequently decreases from superheat to saturation.However,the pressure inside the bubble showed an increase,then a decrease,and finally a negative pressure.

关 键 词：池态沸腾 孤立气泡 相变模型 气液界面 

分 类 号：TK124[动力工程及工程热物理—工程热物理]