Cavitation
Regarding to Conservation of Energy (Bernoulli's equation)
Energy of velocity＋Energy of pressure＝Constant
Pressure decreases with
increase of velocity.
At high altitude, decreasing of atmospheric pressure
decreases boiling temperature.
High-speed flow
induces decrease of pressure, and then "boiling"
takes place at room temperature.
Namely, water
became bubble at room temperature at high-speed flow.
Boiling: Water
becomes vapor by heat up.
Cavitation: Water
becomes vapor by increase of velocity, i.e. decrease of pressure.
Cavitation is developed from cavitation nuclei such as tiny bubble at high-speed region.
Shock wave and/or micro jet is produced, when cavitation bubble is collapsed at low speed
region. Shock wave and/or micro jet takes places plastic deformation.
Cavitation S PeeningTM (Top
page)
Difference between normal water jet and cavitating jet
Effect of Cavitation S PeeningTM
Advantages of Cavitation S PeeningTM
Systems of Cavitation S PeeningTM
How to measure cavitation impact