【摘要】 基于单组分工质池沸腾动态微液层预测模型,提出了预测双组分混合工质沸腾换热系数的理论模型。该模型认为沸腾换热的机理主要是由于在气泡的周期生长过程中所形成微液层的蒸发。模型中考虑了气泡生长过程中液体传质对传热的影响,给出了气泡生长过程中传热面上气液固接触的动态构造。利用本模型所得预测结果与实验结果能够较好地符合。更多还原

【Abstract】 Based on the microlayer model for pool boiling of pure fluid,a theoretical model for pool boiling heat transfer of binary mixture was presented.In the model the influence of mass transfer on heat transfer was also considered.The heat transfer coefficient for pool boiling of binary mixtures was predicted theoretically.In this model,the heat transfer with boiling was mainly attributed to the evaporation of microlayers which were periodically formed while the individual bubbles were forming.The agreement between the present theoretical model and the experiment data is good in the entire range of concentration at higher heat flux.更多还原