Noise of air released to atm.

[9751jld]

How do I calculate the noise generated when air is expelled from a 1" pipe open to the atmosphere. Air is at 132 degrees F at a pressure of 2 psig inlet and 0 psig at the outlet, and ambient temperature. Velocity is 35 ft/sec.

This comes about when a tank is under 2 psig pressure, and is vented to the atmosphere when the tank is being filled. The dry air vented into the tank is through a regulator set at 2 psig.

Thanks,
9751jld

 

[IceStationZebra]

This sounds like a pipe organ type of issue. I would think that it depends quite a lot on the stiffness and exit configuration of the pipe. ISZ

 

[magicme]

i don't know the answer to this question.
but you may post it on the aero forum and see what those folks have to say.

noise of jet exhaust (much higher velocities, i know) are generated i believe by shear of adjacent air streams.

regards

magicme


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[dcasto]

There are vendors that specialize in air vent silencers. They could evalute your situation too.

 

[Rob45]

Isn't this readily measured?