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.
Author: | G. Zhang, Daniel ValeroORCiD, Daniel Bernhard BungORCiD, H. Chanson |
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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 |
Volume: | 60 |
First Page: | 171 |
Last Page: | 184 |
Link: | http://doi.org/10.1016/j.flowmeasinst.2018.02.009 |
Zugriffsart: | campus |
Institutes: | FH Aachen / Fachbereich Bauingenieurwesen |
collections: | Verlag / Elsevier |