已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Influence of aerodynamic pressure on dust removal by supersonic siphon atomization

机械 湍流 超音速 风速 喷嘴 空气动力学 气流 材料科学 粒径 唤醒 环境科学 化学 工程类 气象学 物理 航空航天工程 机械工程 物理化学
作者
Tian Zhang,Xiaogang Mu,Jing Deji,Shaocheng Ge,Xiangxi Meng,Zhao Shu-li,Xiaowei Zhang
出处
期刊:Energy [Elsevier BV]
卷期号:282: 128727-128727 被引量:7
标识
DOI:10.1016/j.energy.2023.128727
摘要

At present, there are many problems in coal mine operation, such as formation of large amounts of dust, complex dust migration behavior, severe respiratory harm, poor on-site performance of spray dust removal technology under windy conditions, and low collection efficiency of respirable dust. To solve the above problems, the finite element method of computational fluid dynamics (CFD) was used. The Spalart-Allmaras turbulence model of COMSOL software and the tracking module for atomized particles broken by droplets were used. They were combined with the Fraunhofer diffraction principle to study the distributions of the velocity of the airflow field, droplet size, droplet velocity and wind resistance for a supersonic water siphonic atomization device. The influence of the above factors on dust removal at different aerodynamic pressures was studied experimentally. The relationships between spray characteristics, flow field velocity distribution, dust removal effect and spray characteristics were revealed. The research showed that with increasing pressure, the supersonic component accounted for an increased proportion of the flow field inside the nozzle, average velocity of the flow field increased, atomization efficiency increased, droplet particle size decreased, and droplet velocity increased. The particle size of the droplets first increased, then decreased and then increased with increasing spraying distance. Additionally, the range of high-speed fine droplet size fog increased with increasing pressure. At the same transverse wind speed, with increasing pressure, the deflection point of the fog field moved backward, and the wind resistance of the spray was enhanced. With the increase in aerodynamic pressure, the dust isolation and negative pressure effect of spray and the dust collection efficiency increased, and there was an optimal value for dust removal in a limited space. The reason was that when the pressure increased to a certain extent, the air flow reversed in the coil at the bottom of the limited space, which blew the dust that was not aggregated at the bottom away from the area where dust was falling. Thus, the dust was entrained in fog droplets but could not be removed from the air flow. The dust dispersion in the air flow after purification differed greatly at different pressures because the removal efficiency of dust in the 2.5–10 μm particle size range was mainly affected by the pressure. In a field study of a fully mechanized mining face, the fog curtain formed by the device covered the whole section under the condition of airflow disturbance with large transverse velocity, and the comprehensive respirable dust removal efficiency of the working area reached 92.3%. Thus, this method showed good wind resistance and dust removal performance. The study of this technology can provide a clean working environment and theoretical guidance for the safe production of coal in the future, especially for fully mechanized mining faces.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
福大命大完成签到 ,获得积分10
3秒前
微笑的井完成签到 ,获得积分10
3秒前
3秒前
悄悄是心上的肖肖完成签到 ,获得积分10
4秒前
所所应助Arthur采纳,获得10
4秒前
5秒前
5秒前
hhhi应助黎乐荷采纳,获得10
6秒前
清逸发布了新的文献求助10
6秒前
8秒前
90090发布了新的文献求助10
10秒前
HMG1COA完成签到 ,获得积分10
10秒前
CC发布了新的文献求助10
11秒前
wildeager完成签到,获得积分10
13秒前
Ray发布了新的文献求助10
15秒前
负责怀莲发布了新的文献求助10
16秒前
小马甲应助luwenxuan采纳,获得10
17秒前
19秒前
霜鸣发布了新的文献求助10
20秒前
田様应助黎乐荷采纳,获得10
23秒前
ddm完成签到 ,获得积分10
23秒前
研友_LX0QOL完成签到 ,获得积分20
23秒前
Arthur发布了新的文献求助10
23秒前
summer夏完成签到,获得积分10
24秒前
weishen发布了新的文献求助10
26秒前
Lucas应助负责怀莲采纳,获得10
27秒前
霜鸣完成签到,获得积分10
28秒前
FYhan完成签到 ,获得积分10
29秒前
ofa完成签到,获得积分20
32秒前
mm完成签到 ,获得积分10
37秒前
小小怪完成签到 ,获得积分10
39秒前
40秒前
40秒前
华仔应助方法采纳,获得10
41秒前
英姑应助新的旅程采纳,获得10
43秒前
43秒前
44秒前
科研通AI2S应助SaiKerry采纳,获得10
44秒前
song发布了新的文献求助10
45秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
Aktuelle Entwicklungen in der linguistischen Forschung 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989949
求助须知:如何正确求助?哪些是违规求助? 3532017
关于积分的说明 11255865
捐赠科研通 3270829
什么是DOI,文献DOI怎么找? 1805053
邀请新用户注册赠送积分活动 882233
科研通“疑难数据库(出版商)”最低求助积分说明 809216