Bindel 



Fig. 6a - Cavitation patterns for fixed -bladed 

 propeller, 7 = 0, 5 = 10°, J = 0.65, a = 3 



BACK 



FACE 



Fig. 6b - Cavitation patterns for oscillating - 

 bladed propeller, 7 = ±3°, i// = 0, 6 - 10°, 

 J = 0.65, cr = 3 



hub (at least for d = 15°). But, on the other hand, there is a substantial loss 

 as regards the sheet cavitation on the face leading edge. 



For the other types of cavitation, there is a loss, especially for bubble and 

 sheet- vortex cavitation, independent of the existence of new types of cavitation. 



On the whole, the combination 7 = ±3°, = has a negative effect. 



1510 



