Experimental Characterisation of the Far-Field Noise in Axial Fans Fitted with Shaped Tip End-Plates

Table 1

Specifications of AC90/6 fan family of fans.

	AC90/6 fans
Blade geometry	Hub	Tip
l/t	1.32	0.31
Pitch angle (deg)	36	28
Camber angle (deg)	46	41
solidity	1.24	0.3
Fan rotor
Blade number	6
Blade tip pitch angle (deg)	16/28
Blade tip stagger angle (deg)	74/62
Hub-to-casing diameter ratio 𝑣	0.22
Tip diameter (mm)	900.0
Rotor tip clearance 𝜒 (% span)	1.0
Rated rotational frequency (rpm)	935/950