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On the estimation of free-surface turbulence using ultrasonic sensors

  • Accurate determination of free-surface dynamics has attracted much research attention during the past decade and has important applications in many environmental and water related areas. In this study, the free-surface dynamics in several turbulent flows commonly found in nature were investigated using a synchronised setup consisting of an ultrasonic sensor and a high-speed video camera. Basic sensor capabilities were examined in dry conditions to allow for a better characterisation of the present sensor model. The ultrasonic sensor was found to adequately reproduce free-surface dynamics up to the second order, especially in two-dimensional scenarios with the most energetic modes in the low frequency range. The sensor frequency response was satisfactory in the sub-20 Hz band, and its signal quality may be further improved by low-pass filtering prior to digitisation. The application of the USS to characterise entrapped air in high-velocity flows is also discussed.

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Metadaten
Author:G. Zhang, Daniel ValeroORCiD, Daniel B. BungORCiD, H. Chanson
DOI:https://doi.org/10.1016/j.flowmeasinst.2018.02.009
ISSN:0955-5986
Parent Title (English):Flow Measurement and Instrumentation
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Year of Completion:2018
Date of the Publication (Server):2018/04/30
Volume:60
First Page:171
Last Page:184
Link:http://doi.org/10.1016/j.flowmeasinst.2018.02.009
Zugriffsart:bezahl
Institutes:FH Aachen / Fachbereich Bauingenieurwesen
collections:Verlag / Elsevier