摘要
根据摇摆状态下竖直管内降膜吸收过程的特点建立数值模型.通过数值模拟,得到不同摇摆周期和摇摆幅度条件下的液膜速度、温度和浓度分布,以及液膜热量和质量通量的变化规律.结果表明,摇摆改变了液膜在吸收器内的停留时间及液膜内的速度分布,与静止状态相比,大周期的摇摆对降膜吸收过程有利,而小周期的摇摆对降膜吸收过程不利.
According to the characteristics of falling film absorption in the vertical tube,a numerical model was established. By using numerical simulation,the velocity,temperature and concentration distribution of film under different rolling periods and rolling amplitudes conditions were calculated,as well as the variation of heat flux and mass flux. Simulation results show that the rolling changes the standing time of liquid film in the absorber and the velocity distribution in the falling film. As compared to stationary state,a large rolling period enhances the absorption process,while a small one is on the contrary.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2016年第4期79-83,共5页
Journal of Dalian Maritime University
基金
交通运输部海事局科技项目(2012_27)
中央高校基本科研业务费专项资金资助项目(3132016338)
关键词
吸收式制冷
降膜吸收
摇摆
热质传递
数值模拟
absorption refrigeration
falling film absorption
rolling
heat and mass transfer
numerical simulation
