Cavitation

Akram Faisal4212 101 018

DefinitionCavitation is defined as the process of formation of the vapor phase of a liquid when itsubjected to reduced pressures at constant ambient temperature.Sciehlen, Werner., “Virtual Nonlinear Multibody Systems”

The faster the blades are turning, the lower the pressure it gets on the blade surface.

The faster the blades are turning, the more bubbles create behind the propeller.

Liquid

Vapor

Flow

S

S C D

C

DP

ress

ure

Higher Pressure

Low Speed Flow

Lower Pressure

High Speed Flow

Liquid

Vapor

Cavitation

Gas bubble collapse /Vapor quickly changes to liquid phase

Cavitation process

Analyzing propeller pressure distribution with CFD

A CFD AnalysisWhere the cavitation takes place ?

Thank you