Everything about cavitation

Summary

Cavitation in fluid mechanics and engineering normally is the phenomenon in which the static pressure of a liquid reduces to below the liquid's vapor pressure, leading to the formation of small vapor-filled cavities in the liquid. When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse and can generate shock waves that may damage machinery. As a concrete propeller example: The pressure on the suction side of the propeller blades can be very low and when the pressure falls to that of the vapour pressure of the working liquid, cavities filled with gas vapour can form. The process of the formation of these cavities is referred to as cavitation. If the cavities move into the regions of higher pressure, they will implode or collapse. These shock waves are strong when they are very close to the imploded bubble, but rapidly weaken as they propagate away from the implosion.

Definitions

• The formation of pits on a surface.
• (fluid dynamics) The formation, in a fluid, of vapor bubbles that rapidly collapse; especially in a rotating marine propeller or pump impeller.
• The formation of cavities in an organ, especially in lung tissue as a result of tuberculosis.

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Voila mon problème : cavitation, même au ralenti. Impossible de depasser 3 noeuds. <br /><br />Bateau : MKIII futura 4.70m <br />Moteur : 60cv 2tps Mariner <br /><br />Note: Anode absente a ce moment (perdue en mer), et fuite sur le boudin catamaran droit. <br /><br />La cavitation est présente même en déplaçant les masses sur le bateau (arriere, avant...)

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