Liner Vibration and Cavitation

In diesel engines, the cylinder liner is one of the places more susceptible to have cavitation. The cavitation process consists in creation (vaporization) of steam bubbles of liquid, and consequence brusque disappearance (condensation) of the same ones in the liquid. When this disappearance or implosion occurs next to the liner surface provokes erosion of the same one. This phenomenon basically occurs from the liner vibration or strangulation of the water flow, that they provoke high speed of the cooling fluid (equation of Bernoulli) [1].

Along a stream line:

In this paper we will analyze how the liner vibration is related to the cavitation process, what is the source and how the easiest way to solve it.

The methodology used was:

• Crank domain analysis,
• Abusive test, in order to accelerate the failure reproduction,
• Counter measure check, by vibration analysis & validation, by abusive test.