Gas Choke Functions
Subsonic and sonic gas rate, upstream pressure, bean size and the critical pressure ratio.
5 functions
PO.SF.CH.Gas.Rate
Gas flow rate through choke, [mmscf/d]. Automatically determines sonic or subsonic flow regime.
PO.SF.CH.Gas.Rate.Sonic
Gas flow rate at sonic (critical) conditions, [mmscf/d]. Rate independent of downstream pressure.
PO.SF.CH.Gas.Pwh
Required upstream pressure for sonic gas flow, [psi].
PO.SF.CH.Gas.Size
Required choke diameter for sonic gas flow, [in].
PO.SF.CH.Gas.Rcrit
Critical pressure ratio for gas (Pdn/Pup at sonic conditions), {1}. Flow is sonic when actual ratio <= critical ratio.