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雾化喷嘴广泛应用于动力机械工程领域。在煤矿湿式除尘系统中,喷嘴的雾化性能决定了除尘效果,开展雾化喷嘴结构参数研究,对提高除尘效率具有重要意义。基于喷嘴气穴等因素,首先阐述了雾化机理;随后设计了一种旋流雾化喷嘴,并利用Fluent对雾化过程进行数值模拟,得出了两相流的运动规律;最后实验测量了不同入口压力下的粒径分布情况,验证了仿真结果的正确性。研究表明:旋流雾化喷嘴可以有效阻止气穴现象的产生,可提高喷嘴的喷雾效率。
Spray nozzles are widely used in mechanical engineering. In the coal mine wet dust removal system, the atomization performance of the nozzle determines the dust removal effect, and the research on the structural parameters of the atomization nozzle is of great significance to improve the dust removal efficiency. Based on the nozzle cavitation and other factors, the atomization mechanism is first described. Then a swirling atomization nozzle is designed and the atomization process is numerically simulated by Fluent. The motion of the two-phase flow is obtained. Finally, The particle size distribution under different inlet pressures verifies the correctness of the simulation results. The results show that the swirl atomization nozzle can effectively prevent the cavitation phenomenon and improve the spray efficiency of the nozzle.