QUANTITATIVE ANALYSIS OF FLOW PROFILE CHARACTERISTICS FOR ULTRASONIC METERING SYSTEMS

摘要

An ultrasonic flow metering system includes a condition monitor. For each chordal path of a plurality of chordal paths of an ultrasonic flow meter the condition monitor is configured to compute: 1) a reference chordal velocity ratio; 2) a predicted chordal velocity based on the reference chordal velocity ratio for the chordal path and measured flow velocities for all other chordal paths of the plurality of chordal paths; 3) a first estimated mean flow velocity for the ultrasonic meter, the first estimated mean flow velocity based on the predicted chordal velocity for the chordal path and the measured flow velocities for all other chordal paths of the plurality of chordal paths; and 4) for each other chordal path of the plurality of chordal paths, a predicted chordal velocity ratio based on the measured flow velocity for the other chordal path and the first estimated mean flow velocity.