双组分混合物沸腾换热的理论研究

A THEORETICAL MODEL FOR POOL BOILING HEAT TRANSFER OF BINARY MIXTURES

本文利用动态微液层模型对双组分混合物的沸腾换热现象进行了理论预测。本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,计算结果与实验结果能够较好的符合。

The heat transfer coefficient for pool boiling of binary mixtures has been predicted based on the dynamic microlayer model theoretically. In this model, the heat transfer with boiling is mainly attributed to the evaporation of microlayers which are periodically formed while the individual bubbles are forming. In the present model the influence of mass transfer on heat transfer is also considered. As a result, the agreement between the present theoretical model and the experiment data is good in the entire r...