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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 internal structure of nozzle on mine dust removal, numerical simulation of internal flow field of micro-oscillation chamber nozzle with different structures was carried out by Fluent software based on grid independence test and SIMPLEC algorithm. The results show that the structure of the micro-oscillation chamber on the inner wall of the nozzle greatly affects the exit velocity, and the two nozzles appear extremely poor at the inlet pressure of 8 MPa. The velocity of the two nozzles along the axis gradually increases in the flow field and finally reaches the maximum in the throat section Speed; Stepped wall micro-oscillation chamber nozzle with a regular wall micro-oscillation chamber nozzle, the exit speed is greater; in the wall micro-oscillation chamber nozzle, the atomization phenomenon are generated inside the micro-oscillation chamber and the cavity opening, and Will produce different degrees of eddy current micro-oscillation chamber.