Table 1 Design specifications and parameters of the axial fan.

Specific speed^a (\({N}_{s}\))

7.77 [−]

\((\omega \sqrt{Q})/{(P/\rho )}^{0.75}\)

Flow coefficient (\(\varPhi\))

0.285 [−]

\({c}_{m2}/{u}_{2}\)

Pressure coefficient (\(\varPsi\))

0.117 [−]

\(P/(0.5\rho {{u}_{2}}^{2})\)

Rotational speed (\(N\))

1470 [revolutions-per-minute]

Hub ratio

0.44 [−]

\({r}_{h}/{r}_{s}\)

Tip clearance^b ratio

0.01 or 0.0028 [−]

\({\delta }_{t}/({r}_{s}-{r}_{h})\) or \({\delta }_{t}/{D}_{2}\)

Solidity

0.769 (hub), 0.155 (shroud) [−]

\(C/S\)

Setting angle^c

49.7 (hub), 23.1 (shroud) [°]

No. of blades & guide vanes

10 & 11

Airfoil series of blade

NACA 3512