固-液接触角对池内核态沸腾换热特性的影响

摘要/Abstract

摘要：

摘要：在考虑固-液接触角影响的半理论沸腾换热模型的基础上，将沸腾换热特性表达为过热度、固-液接触角和物性参数的函数；通过图解法推导出考虑固-液接触角影响的沸腾换热特性的预测关系式；利用无壁面毛细力影响的平坦金属表面或金属表面镀膜加热面在不同饱和压力条件下的饱和水实验数据，获得了适用于不同饱和压力和

关键词: 沸腾, 热流密度, 固-液接触角, 换热特性

Abstract:

Abstract： Based on analysis of a semi-analytical heat transfer model with contact angle effect, it is found that the boiling heat transfer characteristics could be expressed as a function of wall superheat, contact angle and physical properties. A correlation for predicting the effect of contact angle on wall heat flux of pool boiling was deduced by using the graphical method. By analyzing the saturated water data on plane metal surface or its coated surface under different pressure conditions, an empirical correlation for predicting the wall heat flux of saturated water nucleate pool boiling under atmospheric pressure was obtained. Furthermore, a semiempirical nucleate pool boiling correlation applying to various liquids under wider pressures was also proposed. The results show that predicted values of saturated water nucleate pool boiling under atmospheric pressure are in good agreement with the experimental results.

Key words: boiling, heat flux, contact angle； heat transfer characteristics

中图分类号:

TK 124

陈彦君，李元阳，刘振华. 固-液接触角对池内核态沸腾换热特性的影响[J]. 上海交通大学学报（自然版）, 2015, 49(01): 135-140.

CHEN Yanjun,LI Yuanyang,LIU Zhenhua. Effect of Contact Angle on Nucleate Pool Boiling Heat Transfer[J]. Journal of Shanghai Jiaotong University, 2015, 49(01): 135-140.

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