Pvopellev Excitation and Response of 230000 TDW Tankers 



Tip vortex , attached to the blade, continuous 

 Tip vortex, following the blade, often intermittent 



..10 

 x 



§ 

 ■SOB 



a 



"30.6L- 



Model with fins, 6- Waded propeller 



OB 1 - 



Model with fins, 5-bladed propeller 



1.0 r- 



X - 



OB 



0J3 U 



Model without fins, 5-bladed propeller 



06 y - 



Model without fins , 6-bladed propeller 

 _W „ ,1 — t 



J i i L 



j I i L. 



360 270 160 



Position angle, degrees, from upright 



90 



Figure 23 Tests in cavitation tunnel. Radial extension of cavitation 

 in different blade positions. Different hull-propeller 

 configurations. Fully loaded condition, 16 knots 



641 



