a

Axial induction factor

c

Chord

Mass flow rate

p

Pressure

r

Radius

z

Axial direction

A

Cross-sectional area

B

Number of blades

C

Streamline curvature

C_l

Coefficient of lift

C_P

Coefficient of Power

P

Rated Power

Q

Torque

R

Blade radius

T

Thrust

U

Rotor wheel speed