论文部分内容阅读
本文以环已烷为分散相、水为连续相进行了不互溶二元液体混合物的流动传热实验:分析了传热机理;关联了实验数据。对于伴随相变化的不互溶二元液体混合物的流动传热过程。从传热机理上可将其分为四个不同的传热区域。即:液—液、汽—液—液、无相变汽—液和汽—液沸腾四个区域。在汽—液—液区域内,分散相液滴的相变化仅仅起到对连续相加剧湍动的作用,而相变化本身对多相流与壁面的传热无影响.在对单一液滴在另一与之不互溶的连续相中的流体力学及相变过程研究的基础上,本文着重对汽—液—液和无相变汽—液区域内的传热系数进行了无因次数群关联.经验关联式的计算值能够与实验值较好地吻合。
In this paper, cyclohexane as the dispersed phase, water as the continuous phase was immiscible binary liquid mixture flow heat transfer experiments: analysis of the heat transfer mechanism; associated experimental data. Flow heat transfer process for immiscible binary liquid mixture with phase change. From the heat transfer mechanism can be divided into four different heat transfer area. Namely: liquid - liquid, vapor - liquid - liquid, no phase change vapor - liquid and vapor - liquid boiling four regions. In the vapor-liquid-liquid region, the phase change of the dispersed phase droplets only plays a role in aggravating the turbulence of the continuous phase, while the phase change itself has no effect on the heat transfer of the multiphase flow and the wall surface. Based on the study of fluid mechanics and phase transition in the immiscible continuous phase, this paper focuses on the dimensionless association of the heat transfer coefficients in vapor-liquid-liquid and non-phase-change vapor-liquid regions The calculated value of empirical correlation can be well fitted with the experimental value.