8 Skew angle in the projected plane measured from spindle 



axis to the radial line through the midchord of the section 

 at the local radius, positive in direction opposite to 

 ahead rotation 



V Kinematic viscosity of water 



p Mass density of water 



p Mass density of propeller 



a Local cavitation number, 2gh/V tl 



O Cavitation number at shaft centerline, based on speed of 



° 2 



advance, 2gh/V 



(j) Pitch angle of propeller blade section tan (P/(2"nr)) 



<J> T nth harmonic phase angle of pressure signal due to loading 

 effects, based on a cosine series 



c}> Phase angle of nth harmonic of P based on a cosine series representation, 

 n _ N 



P(r,x,6) = P(r,x) + Z P (r,x) cos (n9-<j> ) 

 n=l 



<j) * Phase angle of nth harmonic of P based on a sine series representation, 

 n N 



P(r,x,0) = P(r,x) + S P (r,x) sin (n9+cj> ) 

 n=l 



<j> Phase angle of nth harmonic of thrust per blade based on a 

 cosine series representation, 



N 



T(9) = T + I T cos 



i n 

 n=l 



r\) 



SUBSCRIPTS 

 avg Average value for two or more experimental runs 

 cal Value determined during calibration 

 cor Corrected value 

 des Design values 



xii 



