Propeller Excitation and Response of 230000 TDW Tankers 



Table 1 



1) Model No 1600-B (Thor shammer) has a slightly different fin 

 (smaller) than 1600-C (Norse King). Model 1600-B was not tested. 



2) Refers to the full scale propeller. The corresponding value for the 



model propeller was 2% lower, i.e. P/D ■, -, = 0.723. 



c c ' model 



3) Nozzle propeller. Dimensions of nozzle, D, 



= 10.0 m, 1 = 4. 13m. 



The two conventional propellers were designed using the vortex 

 theory in accordance with the standard procedure used for merchant 

 ship propellers at SSPA. Different radial circulation distributions 

 were used for the two propellers, resulting in different radial camber 

 and pitch distributions. 



IV. FULL SCALE TESTS 



IV . 1 . Test Eq ui pment and Test Conditions 



On the first ship tests were carried out at two different occa- 

 sions ; at the delivery trials and at trials arranged after the ship had 

 been fitted with stern fins. On the second ship tests were carried out 

 at the delivery trials and immediately after, the test on this ship in - 

 eluding photographing of cavitation patterns on the propeller blades. 

 The equipment for taking these photographs is indicated in Figure 1. 

 It is further described in \_4 J . 



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