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10.8 - Super-Cavitating Propellers - Coggle Diagram
10.8 - Super-Cavitating Propellers
Super-Cavitating Regime
Cavity covers
whole back
Back no longer wetted
Uma vez que descolou
No more drop in pressure in the back
no matter how much
increase revolutions
Face raises pressure
with increased revolutions
raises thrust
slower rate than before cavitation
Absence
back erosion
Blade design
Ensure separation
Wedge shaped
To ensure super-cavitation
At 0,7 radius
\( \sigma \leq 0,045 \)
Compared to conventional
Needs
Much higher RPM
Lower pitch ratio
10% less efficient
not suffer erosion
Maybe only alternative
for very high speeds
BTW 40 to 80kt
HIGHEST EFFICIENCY
Partially Submerged
