Study on the Atomization and Dust-Reduction Performance of a New Type of External Pneumatic Vortex Fog Curtain Dust Removal Device in Fully Mechanized Excavation Face

Table 1

Atomization performance data table.

Jet wind speed (m/s)	Nozzle working angle (°)	Pressure (4 MPa)		Pressure (6 MPa)		Pressure (8 MPa)
		Range (m)	Radius (m)	Range (m)	Radius (m)	Range (m)	Radius (m)
20 m/s	45°	0.62	0.74	0.68	0.7	0.7	0.68
	60°	0.76	1.05	0.78	1.03	0.8	1
	75°	0.61	1.15	0.64	1.12	0.7	1.05
	90°	0.7	0.77	0.72	0.75	0.75	0.75
	105°	0.54	0.75	0.5	0.72	0.65	0.65
25 m/s	45°	0.56	0.96	0.57	0.93	0.6	0.9
	60°	0.65	1.27	0.67	1.24	0.7	1.2
	75°	0.48	1.37	0.53	1.29	0.55	1.25
	90°	0.44	1.02	0.45	0.98	0.5	0.95
	105°	0.35	0.88	0.38	0.85	0.4	0.8
30 m/s	45°	0.43	1.31	0.46	1.27	0.5	1.2
	60°	0.56	1.47	0.59	1.43	0.6	1.4
	75°	0.36	1.6	0.38	1.55	0.4	1.5
	90°	0.26	1.21	0.29	1.15	0.3	1.1
	105°	0.18	1.02	0.19	0.99	0.2	0.95