Reference : On the estimation of free-surface turbulence using ultrasonic sensors
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/224410
On the estimation of free-surface turbulence using ultrasonic sensors
English
Zhang, Gangfu mailto [The University of Queensland > Dept. of Hydraulic Engineering, School of Civil Engineering > > >]
Valero Huerta, Daniel mailto [Université de Liège - ULiège > > > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage)]
Bung, Daniel B. mailto [FH Aachen > Hydraulic Engineering Section > > >]
Chanson, Hubert mailto [The University of Queensland > Dept. of Hydraulic Engineering, School of Civil Engineering > > >]
Apr-2018
Flow Measurement and Instrumentation
Elsevier
60
171-184
Yes (verified by ORBi)
International
0955-5986
United Kingdom
[en] Acoustic displacement meter ; Free-surface dynamics ; Wave ; Power spectra ; Air-water flows ; Stepped spillway
[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.
Urban and Environmental Engineering
Researchers ; Professionals
http://hdl.handle.net/2268/224410
10.1016/j.flowmeasinst.2018.02.009
https://www.sciencedirect.com/science/article/pii/S0955598616302333?via%3Dihub#keys0005

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