Cavitation jet nozzle

[gerdsmit]

A jet nozzle in a continuous open system is connected to a 5 gpm, 100 psi centrifugal pump 1" o.d. and by the passage through an orifice plate forces the liquid to a pressure drop to nearly 400 Pa (below liquids vapor pressure). The outlet of the nozzle is connected to a pressure recovery chamber to induce bubbles formed to collapse. Theoretically may I achieve cavitation events in the p.r. chamber ?. What would be the approximate residence time of the liquid in the whole nozzle system ?. If it is an open system may I consider the recovery pressure as 1 atm.?

 

[bewdley]

Probably yes. But cavitation is a "function" of temperature also, so you have to consider the P-T relation of your specific liquid.

 

[hacksaw]

practical experience with cavitating plates in piping (rather than testing) the cavities collapase as soon as the pressure recovers (downstream of the plate) unless you have dissolved gases present.

 

[insult2injury]

If your recovery tank is vented to atmosphere, then you won't have cavitation, you will have flashing flow. Cavitation occurs when local pressures drop below saturation pressures but recovery to pressures above the saturation pressure.

I2I

 

[rmw]

Is this a homework question? It is worded like it is right out of a textbook.

rmw