入射角度对喷雾碰壁后粒径分布的影响  

Effect of Spray Angle on Particle Size Distribution of Spray-Wall Impingement

作　　者：王朋辉 杜慧勇 杨丰源 武选柯 王站成 徐斌 WANG Penghui;DU Huiyong;YANG Fengyuan;WU Xuanke;WANG Zhancheng;XU Bin(Vehicle&Transportation Engineering School,Henan University of Science&Technology,Luoyang 471003,China)

机构地区：[1]河南科技大学车辆与交通工程学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2021年第4期35-39,46,M0004,共7页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家重点研发计划基金项目(2016YFD0700700)。

摘　　要：搭建喷雾碰壁试验台架,通过激光粒度仪研究了喷雾碰壁对液滴粒径空间分布的影响。探究喷雾以30°和45°两种不同入射角碰壁后,近壁面处喷雾粒径随时间的变化趋势。试验结果表明:碰壁有利于小粒径液滴的形成。喷射初期,喷雾的空间粒径分布不均匀,随着喷射和碰壁时间的持续,喷雾主束区和反射区的液滴粒径分布均匀,粒径为40~60μm。入射角度的不同会导致碰壁反射区小粒径液滴区域出现的位置、形状和区域面积不同。喷雾以45°入射角碰壁时,小粒径液滴区域更大,近壁面处液滴空间粒径分布均匀化的速度更快,破碎效果更好。The effect of wall-jet interaction on the near wall droplet size spatial distribution was measured by a laser particle size analyzer in a spray rig.The change trend of the spray particle size near the wall with time after the spray hitting the wall was explored at two different incident angles of 30°and 45°.The results show that impinging spray is likely to produce much smaller droplets than that of free spray.The spatial particle size distribution becomes uniform after wall-jet interaction,and the droplet sizes are mostly 40~60μm.The spray incident angle affects the area and position of reflected small droplets.When the spray hits the wall with an incident angle of 45°,the area of small-size droplets is larger,and the spatial particle size distribution of the droplets near the wall surface is uniformized faster and the crushing effect is better.

关 键 词：喷雾碰壁 激光粒度仪 粒径分布 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]