Signal Analysis of Characteristics Using Passive Acoustic Emission Technique in Gas-Solid Pipeline Flows

Table 1

Standard deviation of different lengths.

Length of rod (mm)	Solid to air mass ratio	Gas volume flow (m^3/h)	Standard deviation
25	0.6	160	0.1838
		200	0.2495
		240	0.3385
	1.0	160	0.2010
		200	0.2775
		240	0.4300
	1.4	160	0.2242
		200	0.3222
		240	0.4510
35	0.6	160	0.2501
		200	0.3855
		240	0.4350
	1.0	160	0.2891
		200	0.4305
		240	0.5523
	1.4	160	0.3114
		200	0.4732
		240	0.6142