文献类型：期刊文献

中文题名：液体射流内部气泡对黏性流体气流式雾化的影响

英文题名：Effects of Bubbles in Liquid Jet on Air-Blast Atomization of Viscous Liquid

作者：吴兆伟[1];赵辉[1];吴欣洁[1];刘海峰[1];周骛[2];蔡小舒[2]

机构：[1]华东理工大学洁净煤技术研究所,上海煤气化工程技术研究中心,上海200237;[2]上海理工大学能源与动力工程学院,上海200093

年份：2021

卷号：47

期号：4

起止页码：392

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金(21878095);国家重点研发项目(2018YFC0808500)。

语种：中文

中文关键词：气泡;黏性流体;气流式雾化;液滴直径;喷嘴;

外文关键词：bubble;viscous fluid;air-blast atomization;droplet diameter;atomizer;

摘要：使用马尔文激光粒度仪研究了同轴双通道喷嘴液体射流内部气泡对黏性流体气流式雾化效果的影响。以甘油溶液(昂色格数(Oh)为0.0346~0.407)为液相,空气为气相,研究了不同环隙气流速度(94.8~142 m/s)和液体射流速度(0.29~1.21 m/s)下雾化液滴直径的变化规律。结果表明:当Oh较小时,在较低液体射流速度下,雾化液滴直径随气液体积流量比的增大而减小;在较高液体射流速度下,雾化液滴直径随气液体积流量比的增大而增大。当Oh较大时,雾化液滴直径随气液体积流量比的增大而增大。建立了一个物理模型用来描述黏性流体的雾化液滴直径随气液体积流量比的变化规律,结果表明模型计算值与实验值的偏差小于±5%。
The liquid jet atomization is widely applied to chemical engineering and aerospace.Atomization performance has a significant influence on the chemical reaction and mass transport.Air-blast atomization is an effective method to obtain fine droplets,especially for the viscous liquid jet atomization.How to obtain deserved size droplets has been a hot area of atomization research.The effects of bubbles in the liquid jet on the air-blast atomization of viscous liquid were investigated using the Malvern laser particle size analyzer.The glycerol-water solution with Ohnesorge number(Oh)of 0.0346—0.407 was used as the liquid phase,and air as the gas phase.Experiments with various coaxial gas velocities(94.8—142 m/s)and liquid jet velocities(0.29—1.21 m/s)were conducted to study the influences of inner bubbles on the droplets size.It was found that at low Oh,the droplet diameter decreased with the volumetric flow rate of aerating gas for the low liquid jet velocity,and the droplet diameter increased with the volumetric flow rate of aerating gas for the high liquid jet velocity;the droplet diameter increased with the volumetric flow rate of aerating gas at high Oh.A model was deduced to delineate the variation trend of the droplet diameter.We compared the predictions of this model with experimental results and found that the relative deviations were less than±5%.