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介绍了一种基于Hartmann哨的超声雾化喷嘴。通过激光粒度分析仪对喷嘴的雾化特性进行了实验研究,分析了不同气压对雾滴索特平均直径(SMD)、雾化角和用水量的影响。对喷嘴加装了中心杆,对比了有无中心杆对于雾滴SMD的影响。研究表明:随着气压的增大,雾滴SMD显著减小,雾化角增大,而气压在0.5 MPa时两者达到极值并趋于稳定;喷嘴加入中心杆,并在气压达到一定值后,雾滴SMD有了明显的减小,最小雾滴SMD可以达到12μm;在气压为0.5 MPa,用水量最少,雾化效果最佳。
An ultrasonic atomization nozzle based on Hartmann whistle is introduced. The atomization characteristics of nozzles were experimentally studied by laser particle size analyzer, and the influence of different air pressure on the mean diameter (SMD) of spray droplets, atomization angle and water consumption was analyzed. The installation of a central nozzle on the nozzle, compared with the center of the rod for the impact of SMD droplets. The results show that with the increase of pressure, the droplet SMD decreases and the atomization angle increases, while the pressure reaches 0.5 MPa, both of them reach the extreme value and tend to be stable. The nozzle joins the center rod and reaches a certain value After the droplet SMD has been significantly reduced, the smallest droplet SMD can reach 12μm; at a pressure of 0.5MPa, water consumption at least, the best atomization effect.