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Mechanism of Cavitation - Coggle Diagram
Mechanism of Cavitation
Stagnation pressure
face of leading edge
V=0
\( q= \frac{1}{2} \rho V_0² \)
Pressure on back of blade
drops meaningfully
Water does not support tension
Flow breaks down
Creates bubbles and cavities
Pressure = vapor pressure of water \( p_v \)
Not really
air in sea water, cavitation occurs in higher pressure
Cavitation Number
\( \sigma=\dfrac{p_0-p_v}{\frac{1}{2} \rho V_0²} \)
\(p_0\) = Total static pressure
Sum of Hydrostatic and atmospheric pressure
\( p_{atm} + \rho g h \)
:warning: Quanto
MENOR
, Mais provável de Cavitar
Diferença de pressão pela Pressão de Estagnação
Angle of attack
Increases possibility of cavitation
Happens first
Upper part of propeller
shallower part
