文献类型：期刊文献

英文题名：Effects of serrated pulsating airflow on liquid film evaporation in a vertical channel: A numerical study

作者：Ling, Changming[1,2]; Zhong, Yin[1,2]

机构：[1] Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China; [2] School of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang, Guangdong Province, 524000, China

年份：2020

卷号：14

起止页码：1

外文期刊名：Frontiers in Heat and Mass Transfer

收录：EI(收录号：20203109004622)、Scopus(收录号：2-s2.0-85090680208)

语种：英文

外文关键词：Air - Boundary layers - Evaporation - Mass transfer

外文摘要：Effects of serrated pulsating airflow on liquid film evaporation in a falling film channel was numerically studied based on a two-dimensional model. The mechanism of pulsating airflow evaporation was studied as the pulsating airflow swept across the vertical liquid film surface at the stagnant temperature. Effects of amplitude, frequency, and velocity of the serrated pulsating airflow at certain evaporation time on evaporation were analyzed. Compared with the uniform airflow, the highest relative evaporation of liquid film on vertical pipe inner surface was increased by about 0.3 %. When the airflow was pulsating, the cycle of vapor mass flow rate was the same as the cycle of pulsating airflow. Pulsating airflow disturbed the boundary layer periodically and carried the vapor away; this intensified the mass transfer of liquid film, hence promoting vapor generation under certain conditions. ? 2020, Global Digital Central. All rights reserved.