Au = 



(5) 



where 







S = rH J [*(l ' y '°) - +,■(-! ' y '°) | 



dy 



JM 



-y.o - 



,y,o 



dy 



-T 



where L and T are the ship length and draft, respectively. In Equation (5), 

 the draft T is assumed to be uniform from the bow at x =- L/2 to the stern 

 at x = L/2; the centerplane of the ship is on z = 0. 



Similarly, for a slender axisymmetric body of revolution in a wind 

 tunnel of circular cross section, the mean-speed increment averaged over 

 the body surface is given by 



Au = u - u 



where 



x = j , R=0 

 L x =- | , R=0 



, X = -r- , R=0 



x =- -2 , R=0 



(6) 



where 



• + 



2 j. 2 

 y + z 



and the peripheral length along a body meridian is approximated by the 

 body length, assuming that the body is slender. 



