喷嘴结构对液体喷射破碎粒径影响的实验研究  

Experiment Study on Droplet Size of Liquid Jet under Different Nozzle Structure Conditions

作　　者：余留芳[1] 李磊[1] 严晓芳[1] 王嘉伟 YU Liu-fang;LI Lei;YAN Xiao-fang;WANG Jia-wei(The National Key Laboratory of Civil NBC Disaster Protection,Institute of Chemical Defense,Beijing 102205,China)

机构地区：[1]防化研究院国民核生化灾害防护重点实验室,北京102205

出　　处：《科学技术与工程》2018年第18期151-155,共5页Science Technology and Engineering

摘　　要：为研究喷嘴结构对液体喷射破碎粒径的影响规律,通过阴影追踪法测得在不同喷嘴结构条件下液体喷射破碎液滴粒径分布。结果表明:喷嘴直径越大、收缩角度越平缓、破碎液滴索特平均直径(SMD)越大;喷嘴长径比增大会使得纯净水的液滴SMD增大;但对于甘油溶液,则会使得其液滴SMD减小;同时,喷嘴出口倒角会比无倒角时破碎液滴SMD增大,比较还发现45°倒角比倒圆角时破碎液滴SMD稍大。Shadow tracing method was used to obtain the droplet size characteristics of liquid jet in different nozzle structures.Results show that liquid droplet Sauter mean diameter(SMD)is infected by nozzle s diameter,concentrate angel,L/D ratio and nozzle s chamfer form.The SMD increases with the increase of nozzle s diameter and concentrate angel.Meanwhile,the SMD of water drops increases with the L/D ratio,however,the situation is just opposite in the glycerol solution liquid jet.It shows that the SMD of both water and glycerol solution jet increase with nozzle of chamfer form,and the chamfer form of 45°angel has a little bigger drop diameter than chamfer form of circular angel.

关 键 词：液体喷射 喷嘴结构 阴影追踪法 索特平均直径 

分 类 号：TB126[理学—工程力学]