Experiment Research on Atomization Process and Dust Reduction Performance of Swirl Pressure Nozzle

Abstract In this study, experimental studies on the atomization characteristics, droplet breakup and dust reduction performance of four X-swirl nozzles with different inlet/outlet diameter ratio() were performed. The results of the nozzle atomization characteristics shows that with increases, the atomization angle is increasing trend. The atomization range and the droplet velocity is decreasing trend. The results of the droplet breakup study of the nozzle show that with the increase of , the droplet breakup range of the spray field is gradually increasing, but the droplet breakup intensity of the spray field is gradually decreasing. At = 3.33 and 3.63, droplet breakup occurs mainly in the range of 0–4 mm in the strong turbulent region. At = 3.75, droplet breakup occurs mainly in the range of 0–2 mm in the strong turbulent region. At = 3.96, droplet breakup occurs mainly in the range of 0–1 mm in the strong turbulent region. Droplet breakup in the spray field at = 3.33 and = 3.67 was better than that at = 3.75 and = 3.96. From the dust reduction experimental results, the dust reduction efficiency increases and then decreases with the increase of . The dust reduction efficiency is highest among the four nozzles at = 3.67. Based on the dust reduction curves of four different of nozzles, it is predicted that the optimal dust reduction condition will be achieved at of 3.60, which provides a reference for the design and optimization of nozzles.