摘要
采用Eulerian-Lagrangian耦合模型,对内混式空气雾化喷嘴性能进行了数值模拟,模拟结果表明:索特尔平均直径随气液质量流量比的增加,先逐渐减小,达到极小值后,又逐渐增大,SMD的极小值约为39.5μm;当气液质量流量比为23%时,距离喷嘴出口20 mm处液滴基本被气流束缚在扇形平面方向上±20 mm的范围内,液滴浓度和速度分布呈"双峰型"分布,最大值出现在"扇形"喷雾区域的边缘处(Y=15 mm和Y=-15 mm);绝大部分液滴粒径在15～50μm,峰值约为25μm,索特尔平均直径为45.2μm。
Based on Eulerian-Lagrangian coupling model,the performance of fan-shaped air-blast atomizer was simulated.The results showed that along with the increasing of gas-liquid mass flow ratio,Sauter Mean Diameter（SMD）decreased firstly,and after reaching the minimum value（39.5 μm）,it began to increase.When the gas-liquid mass flow ratio was 23%,the droplets located at 20 mm from the atomizer were restricted to the field ranging from-20 mm to 20 mm in the fan-shaped direction,and the spatial droplet concentration distribution and velocity distribution were in bimodal distribution,with the maximal value occurring on the edge of the fan-shaped field（Y=15 mm,Y=-15 mm）.The droplet diameter mostly ranged from 15 μm to 50 μm,the peak value and SMD were 25 μm and 45.2 μm,respectively.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2011年第2期269-274,共6页
Chemical Industry and Engineering Progress
基金
国家十一五科技支撑计划项目(2006BAJ01A06-3)
关键词
液体雾化
扇形
速度分布
液滴粒径分布
liquid atomization
fan-shaped
velocity distribution
droplet size distribution
