Table 2 Variable range of each design parameter for the anti-stall fin (ASF).

Radial length (\({l}_{r}/{D}_{2}\)) [−]

0.01

0.01625

0.0225

0.02875

0.035*

“Radial length” section

Axial length (\({l}_{a}/{D}_{2}\)) [−]

0.05

0.075

0.1

0.125

0.15*

“Axial length” section

Axial gap (\(\delta /{D}_{2}\)) [−]

0.01*

0.04

0.05

0.06

0.07

“Axial gap” section

Number of fins (\(Z\))

4

7

10

13*

“Number of fins” section

Tangential angle (\(\theta\)) [°]

\(\pm\) 0*

\(\pm\) 30

\(\pm\) 45

\(\pm\) 60

“Tangential angle” section