APPLICABILITY OF ULTRASONIC PULSED DOPPLER FOR FAST FLOW-METERING

Stéphane Fischer, Claude Rebattet, Damien Dufour

Abstract

Measurement of fluctuating flows in hydraulic machines is an ongoing challenge for which classical flow meter technologies (Differential pressure, Magnetic, Turbine and Propeller) are not well adapted. The ultrasonic pulsed Doppler technique allows to measure instantaneous velocity profiles in a very short time. This paper presents the performances of the ultrasonic velocity profiler UB-Lab to achieve faster velocity flow measurement through hydraulic pipes. The system has been optimized (transducer frequency, beam angle, parameters of sequencing) in order to reduce effect of wall echoes, to keep a good velocity range and to minimize the effect of secondary currents. The paper presents the measurement system with UB-lab's software module dedicated to fast flow-metering, the velocity profile measurement in a mixing tank, the bench demonstrator, the results and the perspectives of development of such solutions.

Keywords

hydraulic, ultrasonic pulsed Doppler, flow metering

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IMEKO-TC9-2013-103.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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