Laser ranging measurements of turbulent water surfaces

Gašper Rak (Author), Franci Steinman (Author), Marko Hočevar (Author), Matevž Dular (Author), Matija Jezeršek (Author), Urban Pavlovčič (Author)

Abstract

Laser ranging is a measurement method, applied in a wide range of applications. In this study, laser ranging is used to measure the height of turbulent water flows. Measurements were performed in three cross sections of a confluence where a tributary flow meets the main flow. Both flows exhibited high Reynolds and Froude numbers where the free-water surface profiles were turbulent, non-stationary and non-homogeneous. Measurements were taken using a commercial LIDAR and a high-speed camera. The high-speed camera was operated on the principle of laser triangulation, using only the illumination from the LIDAR laser beam. Since, no other state-of-the-art method for measuring instantaneous water surface profiles exists, LIDAR and triangulation methods could only be compared with each other. The results show good agreement between both methods for the average turbulent water profile and fair agreement for instantaneous profiles. Presented herein is an explanation of these results.

Keywords

hidrotehnika;LIDAR;laserska triangulacija;prosta površina;turbulenca;nestacionarna površina;hitra kamera;hydrotechnics;laser triangulation;free surface;turbulence;non-stationary surface;high-speed camera;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	626/627
COBISS:	9085793
ISSN:	0997-7546
Views:	490
Downloads:	142
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	hidrotehnika;LIDAR;laserska triangulacija;prosta površina;turbulenca;nestacionarna površina;hitra kamera;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2022-06-01
Pages:	str. 165-172
Issue:	ǂVol. ǂ81
Chronology:	May/Jun. 2020
DOI:	10.1016/j.euromechflu.2020.02.001
ID:	12982365