R^ Propeller hub radius 



Rn Body length Reynolds number 



s 



Surface 



Resistance 



t Thrust deduction fraction; time; thickness 



T Thrust 



'u^ (x.fVf'P) = (u',u'',u') = Induced velocities 



u(x,r) Circumferential mean induced velocities 



V Ship speed 



V Fluid velocity 

 w(r) Wake fraction 



(x,y,z) Cortesian coordinate system 



(x,r,V) Cylindrical coordinate system fixed to the propeller 



Z Number of Blades 



3. Hydrodynamlc pitch angle 



V Vorticity 



r Bound circulation 



vil 



