Experimental Investigation on Atomization and Dustfall Characteristics of Combined Nozzles for Shearer External Spray in Fully Mechanized Coal Mining Face

Table 4

Mean values of the atomization characteristic parameters of spray group under different spacings and angle changes.

d(mm)	α (°)	Spray droplet size						Droplet velocity
		D0.1/μm	D0.5/μm	D0.9/μm	D32/μm	D43/μm	Vx/m/s		Vy/m/s
150	0	37.02	90.35	161.28	78.43	97.14	25.49		1.34
	5	36.90	89.65	158.79	77.86	94.22	24.85		1.41
	10	34.27	85.13	149.64.	73.25	88.73	23.56		1.46
	15	35.46	87.02	154.51	75.39	95.51	23.13		1.55
200	0	35.97	85.20	154.16	75.81	87.63	27.69		1.45
	5	33.24	81.73	143.73	73.25	85.81	26.85		1.50
	10	31.15	79.34	137.57	69.73	82.08	25.40		1.58
	15	34.52	83.58	145.31	72.36	89.45	24.72		1.66
250	0	41.85	97.21	171.60	85.73	96.91	29.16		1.53
	5	39.46	93.47	169.04	83.36	98.48	27.72		1.59
	10	35.01	86.90	157.13	79.60	90.65	26.34		1.63
	15	36.33	91.52	165.79	82.09	93.14	25.51		1.69