Non-intrusive flow meter for the liquid component of two phase flow based on solid, liquid or gas borne sound

摘要

A method for measuring the liquid mass flow rate exiting a two phase (gas/liquid) feed nozzle includes determining the Power Spectral Density from the output of an accelerometer in close proximity to the restriction orifice controlling the gas flow, or of a pressure transducer in contact with the gas flow on the downstream side of the restriction orifice, and determining the area of the Power Spectral Density over a frequency band including at least one gas flow peak(s).;The liquid flow can then be obtained from a predetermined correlation between different magnitudes of the area and corresponding liquid mass flow rates.