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

thread384-446297

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

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

(OP)
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

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

Are you referring to the flexibility of the bottle connection or the accoustic resonance condition?

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

(OP)
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.

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

(OP)
Hi GregLocock, thanks for the reply, and where should I go for the acoustics questions?

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

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


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

Or are you referring to the loss coefficient for the fitting?

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