Nonintrusive Method to Compute Water Discharge in Pipes with a Low Depth-to-Diameter Ratio Using Ultrasonic Doppler Velocimetry
Publication: Journal of Hydraulic Engineering
Volume 141, Issue 3
Abstract
A nonintrusive method to calculate water depth and discharge in partially full pipes using data from a single ultrasonic Doppler velocimeter (UDV) profiler is presented. The position of the free surface is identified from the velocity profiles measured with the UDV. The flow discharge is computed from an approximated parameterization of the velocity field in the cross-section, using a single measured velocity profile. The proposed methodology was applied to steady and unsteady flow conditions in two different pipes with diameters of 90 and 200 mm, and depth-to-diameter ratios up to 0.35. Under these conditions, the water depth and discharge were measured with mean absolute errors of 1 mm and in the 90-mm pipe and 0.5 mm and in the 200-mm pipe. These errors are almost independent of the discharge.
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Published In
Journal of Hydraulic Engineering
Volume 141 • Issue 3 • March 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 21, 2014
Accepted: Oct 23, 2014
Published online: Nov 19, 2014
Published in print: Mar 1, 2015
Discussion open until: Apr 19, 2015
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