过冷流动沸腾热传递的分形模型  

A Fractal Model of Subcooled Flow Boiling Heat Transfer

作　　者：肖波齐[1] 陈玲霞[2] 

机构地区：[1]三明学院物理与机电工程系,福建三明365004 [2]三明学院教务处,福建三明365004

出　　处：《三明学院学报》2007年第2期141-145,共5页Journal of Sanming University

摘　　要：提出过冷流动沸腾热传递的分形模型,根据加热表面活化点的分形分布得到了过冷流动沸腾热流密度的表达式。从该模型中发现过冷流动沸腾热流密度是壁面过热度、流体的过冷度、流体的主流速度与流体的接触角、流体物理特性的函数关系,并且没有增加新的经验常数。模型预测的结果与实验数据进行了比较,两者是极好的吻合。A fractal model for the subcooled flow boiling heat transfer is proposed in this paper. The expression for the heat flux of subeooled flow boiling heat transfer is derived based on the fractal distribution of nucleation sites on boiling surfaces. The proposed fractal model for subcooled flow boiling is found to be a function of wall superheat, liquid subcooling, bulk velocity of fluid, the contact angle and physical properties of fluid. No additional/new empirical constant is introduced. The model predictions are compared with the existing experimental data, and fair agreement between the model predictions and experimental data is found.

关 键 词：过冷流动沸腾 分形 热传递 

分 类 号：TB611[一般工业技术—制冷工程]