摘要
为研究顺风流动下单双层喷嘴的雾化特性,采用Fluent中离散相模型对顺风流动下单、双层喷嘴的雾化特性进行数值模拟,先将雾滴平均粒径的模拟值与实验值进行对比分析,验证模型的可靠性,再分析不同工况下单、双层喷嘴喷射出的雾滴群平均粒径及速度变化规律。结果表明:同一扰动风速及供水压力条件下,单层喷嘴比双层喷嘴喷射出的雾滴群平均粒径小;随扰动风速、供水压力的增大,单、双层喷嘴喷射出的雾滴群平均粒径均逐渐减小;扰动风速显著影响雾滴群的速度分布,扰动风速越大,单、双层喷嘴喷射出的雾滴群速度越大且雾滴群射程越远,整体呈现出大粒径雾滴先于小粒径雾滴沉降的趋势。
In order to explore the atomization characteristics of single-and double-layer nozzle under downwind flow,numerical simulation were conducted using discrete phase model in Fluent.Firstly,the simulation value of average particle size of droplets was compared with the experimental value to verify the reliability of the model.Next,the average particle size and velocity of droplet groups ejected by single-and double-layer nozzles under different conditions were analyzed.The results showed that the average particle size of droplet groups ejected from single-layer nozzle is smaller than that from double-layer nozzle under the same disturbed wind speed and water supply pressure.With the increase of disturbed wind speed and water supply pressure,the average particle size of droplets from both types of nozzles decreases gradually.Disturbed wind speed significantly affects the velocity distribution of the droplet group,with higher velocity and longer range for larger droplets ejected from both types of nozzles.Overall,larger droplets tend to settle before smaller ones.
作者
罗庆云
唐艺芳
陈世强
向玲
LUO Qingyun;TANG Yifang;CHEN Shiqiang;XIANG Ling(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)
出处
《资源信息与工程》
2023年第3期116-120,共5页
Resource Information and Engineering
基金
湖南科技大学2022年校级大学生科研创新计划(srip)项目(YZ2211)
湖南科技大学科研启动项目(E52157)
湖南省教育厅科学研究项目(22C0252)。
关键词
单层喷嘴
双层喷嘴
顺风流
雾化特性
数值模拟
single-layer nozzle
double-layer nozzle
wind flow
atomization characteristic
numerical simulation
