矩形窄通道内汽泡滑移与冷凝前期生长模型研究  

Model Study on Bubble Slide and Early-Stage Condensation Growth in Rectangular Narrow Channel

作　　者：张林 刘汉周[2] 刘晓晶[1] 陈勇[2] 陈德奇[2] Zhang Lin;Liu Hanzhou;Liu Xiaojing;Chen Yong;Chen Deqi(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China;School of Energy and Power Engineering,Chongqing University,Chongqing,400044,China)

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]重庆大学能源与动力工程学院,重庆400044

出　　处：《核动力工程》2023年第2期69-76,共8页Nuclear Power Engineering

基　　金：国家自然科学基金(U2067210)。

摘　　要：矩形窄流道内汽泡生长会直接改变相界面浓度,从而影响流道的传热传质性能。为获得适用于窄流道内不同类型的汽泡生长模型,基于通体可视的实验本体,开展壁面沸腾流动换热实验。基于传热能量方程,研究过冷沸腾中汽泡滑移与冷凝前期两种情况下汽泡生长模型。实验结果表明汽泡呈现两种形式的生长,即汽泡滑移生长以及冷凝前期生长。建立了两种情况下的汽泡生长模型,实验数据验证模型误差在20%以内。因此,本研究能为沸腾两相数值模拟提供更加精细化的汽泡生长模型,从而提高汽泡行为的预测精度。Bubble growth in rectangular narrow channel can directly change the phase interfacial area concentration and thus affect the flow channel's heat and mass transfer performance.In order to obtain a model for different types of bubble growth in a narrow flow channel,wall boiling flow heat transfer experiments are carried out based on a through-body visible test section.The bubble growth models are studied for both bubble slide and early-stage condensation conditions in subcooled boiling.The experimental results show that there are two forms of bubble growth,namely,bubble slide growth and early-stage condensation growth.Based on the heat transfer energy equation,the bubble growth models under the two conditions are established,and it is verified through the experimental data that the model error is within 20%.Therefore,this study can provide a more refined model of bubble growth for two-phase numerical simulation of boiling,thus improving the accuracy of bubble behavior prediction.

关 键 词：冷凝前期生长 汽泡滑移生长 四面可视化 壁面沸腾 实验研究 

分 类 号：TL334[核科学技术—核技术及应用]