Article (Scientific journals)
On the estimation of free-surface turbulence using ultrasonic sensors
Zhang, Gangfu; Valero Huerta, Daniel; Bung, Daniel B. et al.
2018In Flow Measurement and Instrumentation, 60, p. 171-184
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Keywords :
Acoustic displacement meter; Free-surface dynamics; Wave; Power spectra; Air-water flows; Stepped spillway
Abstract :
[en] 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.
Research center :
UEE - Urban and Environmental Engineering - ULiège
Disciplines :
Civil engineering
Author, co-author :
Zhang, Gangfu;  The University of Queensland > Dept. of Hydraulic Engineering, School of Civil Engineering
Valero Huerta, Daniel ;  Université de Liège - ULiège > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage)
Bung, Daniel B.;  FH Aachen > Hydraulic Engineering Section
Chanson, Hubert;  The University of Queensland > Dept. of Hydraulic Engineering, School of Civil Engineering
Language :
English
Title :
On the estimation of free-surface turbulence using ultrasonic sensors
Publication date :
April 2018
Journal title :
Flow Measurement and Instrumentation
ISSN :
0955-5986
Publisher :
Elsevier, United Kingdom
Volume :
60
Pages :
171-184
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 June 2018

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