摘要
为研究喷嘴直径对喷雾干燥制备CL-20雾化特性的影响,采用CFD软件模拟研究了不同喷嘴直径下的液滴停留时间、喷雾高度、塔内速度、温度和丙酮蒸汽含量。结果表明:随着喷嘴直径增加,达到相同喷雾高度所需雾化时间增加。当喷嘴直径在0.5~1.4 mm时,中心轴线上温度随轴向距离增加而升高;当喷嘴直径为2.0 mm时,中心轴线上温度先降低后升高。中心轴线上速度随喷嘴直径增大和轴向距离增加而降低。中心轴线上丙酮蒸汽含量分布与温度分布呈相反趋势。在距喷嘴出口200,400,600 mm截面上,温度呈中心低边缘高分布,速度和丙酮蒸汽含量呈中心高边缘低分布。当喷嘴直径为0.5 mm时,塔内速度最大为53.66 m·s^(-1),丙酮蒸汽含量最高为23.41%。
In order to study the influence of nozzle diameter on the atomization characteristics of CL-20 prepared by spray drying,the droplet retention time,spray height,velocity in the tower,temperature and acetone vapor content under different nozzle diameters were simulated by CFD software.The results show that the atomization time required to reach the same spray height increases with the increase of nozzle diameter.When the nozzle diameter is 0.5~1.4 mm,the temperature on the center axis increases with the increase of axial distance;When the nozzle diameter is 2.0 mm,the temperature on the center axis decreases first and then increases.The velocity on the center axis decreases with the increase of nozzle diameter and axial distance.The distribution of acetone vapor content on the center axis is opposite to that of temperature.On the sections with a distance of 200,400,600 mm from the nozzle outlet,the temperature is low in the center and high in the edge,and the velocity and acetone vapor content are high in the center and low in the edge.When the nozzle diameter is 0.5 mm,the maximum velocity in the tower is 53.66 m·s^(-1) and the highest acetone vapor content in the tower is 23.41%.
作者
张彦奇
李伟伟
柴凡
史晓澜
ZHANG Yan-qi;LI Wei-wei;CHAI Fan;SHI Xiao-lan(College of Chemical Engineering and Technology,North University of China,Taiyuan,030051)
出处
《火工品》
CAS
CSCD
北大核心
2023年第2期66-71,共6页
Initiators & Pyrotechnics
基金
山西省高等学校科技创新项目(No.2020L0327)
中北大学自然科学研究基金(No.XJJ201923)。
