MULTIPHASE VENTURI FLOW METERING METHOD

摘要

A method for measuring fluid flow characteristics in a multiphase fluid stream which passes through a venturi flow meter comprises: measuring liquid holdup ( alpha 1,I) at or near the inlet of the venturi; determining a slip factor (S) which expresses the difference between the gas and liquid velocity at a selected location in the venturi, which slip factor is based on the measured level of liquid holdup; and calculating the fluid flow characteristics on the basis of an algorithm which takes into account the measured liquid holdup ( alpha 1,I) at the inlet of the venturi and different slip factors at the inlet (Si) and in the throat of the venturi (St).