摘要
以核化理论为基础 ,在考虑沸腾表面微结构分布的影响下 ,确定了流动沸腾换热关系式中Chen模型抑制因子的表达式。并以R134a和R2 2为实验工质在 14mm内径的水平光滑管内进行了流动沸腾换热实验 ,对获得的实验数据采用Chen模型建立流动沸腾换热关系式 ,抑制因子采用笔者得到的表达式 ,该换热关系式能很好地和实验数据吻合 ,表明笔者确定的抑制因子表达式能有效提高采用Chen模型建立的流动沸腾换热关系式的准确度。
In present paper, the suppression factor of Chen's model is determined, based on the force and heat balance on a vapour bubble and Clausius-Clapeyron equation, the active nucleate cavity size of flow boiling surface and its disperse characteristic. Furthermore, the correlation is attained using Chen' model and the present suppression factor from the experimental data of R134a and R22 for a smooth tube. The correlation agrees well with the experimental data. It demonstrates the present suppression factor is able to promote the accurate which predicts the heat transfer coefficient of flow boiling in Chen's model.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第6期88-91,共4页
Journal of Chongqing University
基金
国家重点基础研究专项经费资助 (G2 0 0 0 0 2 6 30 5 )
关键词
流动沸腾
抑制因子
核化理论
微结构分布
换热关系式
Chen模型
flow boiling, suppression factor, nucleate theory, cavity disperse characteristic, heat transfer correlation
