is intermittent cavitation ok?

[SBC1969]

Is a little bit of cavitation OK in a hydraulic system?
I am sizing an orifice valve and found that the flow will begin to choke (like a gas) at a cavitation number ([Pu-Pv]/[Pu-Pd]) of about 1.5 or more. After a bit of research I think I can conclude that cavitation is going on.
The valve will be used in a landing gear actuator so it will not see constant flow. Is intermittent cavitation safe? Is there any published information about how long it will take for any damage to occur?

 

[Hydromechdude]

SBC1969, I'd recommend posting your question in the 'Fluid Power engineering' forum. It would get more attention there.

As for your actual question, I don't have much experience, but would not want to introduce anything that caused cavitation. Depending upon how severe it is, you'd be looking at increased wear and reduced life of the component. I'd look at other options (if possible), but unfortunately can't give you any hard numbers or personal experience.

What are the system specs/valve specs if you don't mind me asking?

 

[rb1957]

if the flow rate is associated with a typical service laod, then i thnk you're got a problem. if it's an ultimate, or failure, case you may be alright.

if you're designing the system, why are you asking us ? your in-house knowledge-base is a far better resource.

i think you need also to think of the effect cavitation has on the system ... you'll have bubbles of gas forming and collapsing, maybe this'll affect the performance of the system ?

 

[kontiki99]

I've seen accumulators used in similar situations. Apparently there winds up being fewer weight penalties.