水平管束池沸腾换热机理的研究

A MODEL ON POOL BOILING HEAT TRANSFER IN A HORIZONTAL TUBE BUNDLE

以容积对流模型为基础，考虑滑移气泡机制对管束沸腾换热的影响，建立了管束池沸腾的“组合模型”．总的换热效果由三部分组成：核态沸腾换热，滑移气泡形成的液体薄膜导热及自然对流换热，在整个热流密度区域内，滑移气泡热流份额小于１１％。

Based on Mikic’s transient conduction model[1], a mechanism model is developed for thepool boiling heat transfer on a horizontal tube bundle,In the modified model,the conductionthrough a thin liquid layer between sliding bubbles and the tube surface is considered.Thetotal heat flux is assumed to consist of nucleate boiling,natural convection and the conduc- tion due to the sliding bubbles,It is found that the contribution of the conduction is less thanll/。