A Consistency Test of Thickness and Loading Noise Codes Using Ffowcs Williams and Hawkings Equation

Table 2

Geometrical characteristics of the centrifugal fan.

Description	Impeller	Diffuser	Return channel
Radius of blade inlet (mm)	18	52.7	60
Span of the blade at the entry (mm)	13	6.48	11
Inlet blade angle (∘)	64	85	74
Inclination Angle of the blade inlet (∘)	85.8	0	0
Radius of blade exit (mm)	52	66.1	33
Span of the blade at the exit (mm)	5.4	8.43	12
Angle of blade exit (∘)	64	71.6	15
Inclination angle of the blade exit (∘)	0	0	0
Blade number	9	17	8
Blade thickness (mm)	0.8	0.9	1.6