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how to define the K-value for the connection between a pipe and sphere bottle

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jichai

Mechanical
Joined
Nov 14, 2018
Messages
3
Location
CA
Hi all, I tried to model the connection between a pipe and sphere bottle in a Recip compressor package, but don't know how to define the k-value for this fitting?
Can anyone give some hints? Thanks
 
Are you referring to the flexibility of the bottle connection or the accoustic resonance condition?
 
Hi hacksaw, thanks for the reply. yes, the sphere bottle is used for pulsation control, and I am trying to model the connection between the bottle and the pipes. No idea how much the K value I should define for it.
 
Hi GregLocock, thanks for the reply, and where should I go for the acoustics questions?
 
Good, we've established that it's acoustic and it sounds as if you are talking about a Helmholtz resonator.

In the normal equation k is the stiffness of the gas spring (the big volume) and m is the mass of the slug of air in the neck.

Wiki is your friend.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376
 
Or are you referring to the loss coefficient for the fitting?
 
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