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Detrimental Effects of Cavitaion - Coggle Diagram
Detrimental Effects of Cavitaion
Effects on Propeller Performance
Flow changes
Changes pressure distribution
Changes thrust and torque
Reduces Lift
also drag
Damage of Propellers
Erosion
Shock waves
Usually
Cloud and bubble cavitation
Downstream of the cavitation zone
Also sheet
Corrosion happens
in Eroded surface
Erosion happens
in corroded surface
changes flow
Roughens surface
Bending of trailing edge
High-powered single-screw
Simultaneous collapse of bubbles
Bending towards pressure side
Cavitation-Induced Vibrations and Noise
Propeller-induced vibration
largest part of excitation forces
Pressure fluctuations
induced on afterbody
Cavitation increases amplitude
with a factor BTW 1 and 10
Low frequency
Increase
High frequency
noise levels
Worse for warships
Best method
for avoiding cavitation
Avoid Harmful Cavitation to occur
Lift-Drag Ratio
Decreases as Increases Cavitation
Reduces Cavitation Number,
Increases Cavitation
Until being supercavitating
