Strainer design philosophy re acoustic vibrations

[thermmech]

I already asked this question in thread384-356365 (apologies for cross-posting), however, no-one replied re strainer design criteria with respect to acoustic phenomena. I'm kinda hoping I'm going to have more luck here.

 

[BigInch]

Never heard of such a thing.

I hate Windowz 8!!!!

 

[thermmech]

we're thinking we are having vortex shedding-caused acoustic vibration in the strainer

 

[BigInch]

Why is that an issue?

I hate Windowz 8!!!!

 

[C2it]

I think what you are looking for is more FLOW induced than ACOUSTIC induced vibration. AIV is usually associated with thin wall pipe and fittings under high pressure drop large and flow rate. This excites a bell like ringing in the pipe which can cause rapid failure if associated with a longitudinal weld, discontinuity or similar.

Which kind of strainer are you interested in ? It might be worthy of note that a witch's hat type strainer is structurally very similar to a flow diffuser, often located downstream of a noisy control valve, and thus I would suspect, not a vibration source, perhaps, quite the opposite ?

 

[thermmech]

Gents,

Thanks on your responses. The flow induced vibration is creating noise of about 120 dBA, source seems to be the strainer spool. We will shortly open the strainer and look inside.

 

[BigInch]

Velocity is too high. Resize the strainer for present flow rates.

I hate Windowz 8!!!!

 

[thermmech]

strainer was working fine while mesh was on
no other changes to the system or strainer or op parameters
vortex shedding?

 

[BigInch]

The mesh was reducing velocity, but it was such a high pressure drop across it that the mesh got ripped out.

I hate Windowz 8!!!!