[1]王嘉伟,李 磊,陆晓霞,等.水平和下旋气流对初始气溶胶运动的影响[J].南京理工大学学报(自然科学版),2015,39(05):556.
 Wang Jiawei,Li Lei,Lu Xiaoxia,et al.Influence of horizontal and downward airflow on initial aerosol movement[J].Journal of Nanjing University of Science and Technology,2015,39(05):556.
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水平和下旋气流对初始气溶胶运动的影响
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
39卷
期数:
2015年05期
页码:
556
栏目:
出版日期:
2015-10-31

文章信息/Info

Title:
Influence of horizontal and downward airflow on initial aerosol movement
作者:
王嘉伟1李 磊12陆晓霞1赵守田1柴明明1
1.国民核生化灾害防护国家重点实验室,北京 102205;
2.清华大学 航空航天学院,北京 100084
Author(s):
Wang Jiawei1Li Lei12Lu Xiaoxia1Zhao Shoutian1Chai Mingming1
1.State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China;
2.Aerospace School,Tsinghua University,Beijing 100084,China
关键词:
气液两相流 离散相模型 气溶胶液滴 水平和下旋气流
Keywords:
gas-liquid two-phase flow discrete phase model aerosol droplets horizontal and downward airflow
分类号:
O359
摘要:
该文考虑液滴的碰撞和破碎以及水平和下旋气流的影响,采用离散相模型对空中释放的气溶胶云团在开放空间中的气液两相流流场进行仿真,获得气溶胶颗粒群的运动规律,并进行了实验验证。由仿真模拟和实验可知,在水平和下旋气流速度均较小(小于1 m/s)、喷射角度大于30°、初始粒径为100 μm、喷射速度约为80 m/s时,释放形成的气溶胶颗粒在短时间内可沉降至地面附近; 当水平气流速度增大至3 m/s时,同样条件下释放的气溶胶颗粒更容易在空气中悬浮,不易沉降至地面。在上述两种情况下,喷射角度和下旋气流速度越大,气溶胶颗
Abstract:
Considering the droplets collision-breakup model and the effects of horizontal and downward airflow,the flow of aerosol released from the air to the open environment is investigated numerically by applying the discrete phase model of the gas-liquid two-phase flow.The motion characteristics of aerosol droplets in open environment are obtained and verified by experiments.The numerical and experimental results show that when the velocities of the horizontal and downward airflow are both small(less than 1 m/s),the ejecting angle is larger than 30°,the initial size of the particles is 100 μm,and the ejecting speed is about 80 m/s,the generated aerosol particles sedimentate to the ground in a short time.When the velocity of the horizontal airflow reaches 3 m/s,aerosol particles released under the same conditions show more difficulty to fall to the ground.In the two above cases,increasing the ejecting angle or the downward airflow velocity can make the aerosol particles sedimentate to the ground more easily.

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备注/Memo

备注/Memo:
收稿日期:2015-01-08 修回日期:2015-03-26
作者简介:王嘉伟(1990-),男,硕士生,主要研究方向:液体的气动分散,E-mail:wjw5080@163.com; 通讯作者:李磊(1962-),男,教授,博士生导师,主要研究方向:液体分散和混合,E-mail:rockysys_15@163.com。
引文格式:王嘉伟,李磊,陆晓霞,等.水平和下旋气流对初始气溶胶运动的影响[J].南京理工大学学报,2015,39(5):556-565.
投稿网址:http://zrxuebao.njust.edu.cn
DOI:10.14177/j.cnki.32-1397n.2015.39.05.008
更新日期/Last Update: 2015-10-31