Patent ID: 6502467
Filing Date: 2003-01-07
Classification: G01F

Abstract:
A method for determining mass flow rates of gas and liquid phases in a flow, the method comprising:providing a venturi having an inlet, an outlet, and an extended throat disposed between the venturi inlet and venturi outlet; passing a high void fraction liquid and gas flow through the venturi to create a first pressure differential between the venturi inlet and the extended throat, and a second pressure differential within the extended throat; measuring the first and second pressure differentials; processing the first and second pressure differentials, including the first pressure differential between a pressure measuring point in the throat inlet and a pressure measuring point in the throat outlet, and the second pressure differential between a pressure measuring point in the venturi inlet and a measuring point in the throat outlet; determining a pressure drop in the gas phase due to work performed by the gas phase in accelerating the liquid phase; and determining the respective mass flow rates of gas and liquid of the multi-phase flow.