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Validation of a Simplified LiDAR-Buoy Model Using Open Sea Measurements

[+] Author Affiliations
Wei Yu, Oliver Bischoff, Po Wen Cheng

University of Stuttgart, Stuttgart, Germany

Gerrit Wolken-Moehlmann, Julia Gottschall

Fraunhofer Institute for Wind Energy Systems IWES, Bremerhaven, Germany

Paper No. IOWTC2018-1086, pp. V001T01A009; 7 pages
doi:10.1115/IOWTC2018-1086
From:
  • ASME 2018 1st International Offshore Wind Technical Conference
  • ASME 2018 1st International Offshore Wind Technical Conference
  • San Francisco, California, USA, November 4–7, 2018
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5197-5
  • Copyright © 2018 by ASME

abstract

This work validates a numerical model of the Fraunhofer IWES LiDAR-Buoy by using open sea measurements. Such floating LiDAR systems (FLS) have been deployed for almost twenty years, aiming at exploring the offshore wind resource with lower cost. However, the uncertainty of wind measurements from a moving LiDAR are not clear, particularly due to the wave- and current-induced motion of the buoy. Therefore a numerical model with state-of-the-art approaches in conventional oil and gas industry was developed to quantify uncertainty and understand the effect of environmental conditions on the buoy. The model was validated against data from a measurement campaign at the offshore research platform FINO 3. The results show the challenges and limitations when transferring the experience from the oil and gas industry directly because of the different geometries and the much smaller buoys used for FLS. It has been found that the position of the LiDAR is dominated by the current, which is however commonly simplified in the state-of-the-art approach; the rotational motions are significantly influenced by the wave and can be reproduced up to a certain limit.

Copyright © 2018 by ASME
Topics: Seas , Buoys

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