摘要
为了研究喷嘴内部结构对矿井喷雾除尘的影响,利用Fluent软件,基于网格独立性检验和SIMPLEC算法对不同结构的内壁微振荡腔喷嘴的内部流场进行数值模拟。结果表明:喷嘴内壁微振荡腔的结构对出口速度影响较大,入口压力8 MPa时两喷嘴出现速度极差;两喷嘴在流场中沿着轴线方向速度逐渐递增,最终在喉道段产生最大速度;阶梯式内壁微振荡腔喷嘴与规则的内壁微振荡腔喷嘴相比,出口速度更大;在内壁微震荡腔喷嘴中,雾化现象都在微振荡腔内部以及腔体开口处产生,并且会在微振荡腔内产生不同程度的涡流。
In order to study the influence of nozzle’s internal structure on dust suppression by spraying in coal mine, using Fluent software, the internal flow fields of micro-oscillating cavity nozzles with different structures were simulated by grid independence test and SIMPLEC algorithm. The simulated results show that the structure of the micro-oscillating chamber on the inner wall of the nozzle has a great influence on the outlet speed, when the inlet pressure is 8 MPa, it presents the maximum speed difference between the two nozzles; moreover, both nozzles are gradually increasing along the axial direction, resulting in maximum velocity in the throat section; the stepped inner wall micro oscillation chamber nozzle can further increase the nozzle outlet speed as compared with the regular inner micro oscillation chamber nozzle; in the lining micro oscillation cavity nozzle, the atomization is generated inside the micro-oscillating chamber and the cavity opening, furthermore, it will produce varying degrees of eddy currents in the micro-oscillating cavity.
出处
《煤矿安全》
北大核心
2017年第11期37-39,共3页
Safety in Coal Mines
基金
山西省自然科学基金资助项目(201601D102028)
关键词
喷雾除尘
FLUENT
内壁微振荡腔喷嘴
数值模拟
雾化
dust suppression by spraying
Fluent
lining micro oscillation cavity nozzle
numerical modeling
atomization
