Abstract In this study, experimental studies on the atomization characteristics and dust reduction performance of six different X-swirl nozzles with different outlet diameters were performed. The results of the nozzle atomization characteristics shows that, as the diameter of the nozzle increased, the flow rate of the nozzle gradually increased, while the flow coefficient kept decreasing almost linearly. Meanwhile, with the increase of the outlet diameter, the nozzle range and droplet velocity decreased continuously, while atomization angle and droplet size exhibited an increasing trend in general. From results of the dust-reduction experiment, considering the dust-reduction efficiency and water consumption, it is more appropriate to select a nozzle with an outlet diameter of 1.2 mm when the water supply pressure is higher than 4.0 MPa. When the water supply pressure was low, as the diameter of the outlet increased, the dust-reduction efficiencies of the nozzle for both the total dust and the respirable dust increased significantly. Therefore, under low water supply pressure, when the water consumption at the engineering application site is not limited, using a nozzle with a larger outlet diameter can achieve higher dust-reduction efficiency.

中文翻译：

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出口直径对X型旋流压力喷嘴雾化特性及降尘性能的影响

摘要 本研究对6种不同出口直径的X旋流喷嘴的雾化特性和降尘性能进行了实验研究。喷嘴雾化特性的结果表明，随着喷嘴直径的增加，喷嘴的流量逐渐增加，而流量系数几乎呈线性下降。同时，随着出口直径的增大，喷嘴射程和液滴速度不断减小，而雾化角和液滴尺寸总体呈增大趋势。从降尘实验结果来看，综合考虑降尘效率和用水量，当供水压力高于4.0 MPa时，选择出口直径为1.2 mm的喷嘴更为合适。当供水压力较低时，随着出水口直径的增加，喷嘴对总粉尘和可吸入粉尘的降尘效率均显着提高。因此，在供水压力较低的情况下，在工程应用现场用水量不受限制的情况下，使用较大出口直径的喷嘴可以达到更高的除尘效率。