Contribution to the ccp-wsi blind test series 3: Analysis of scaling effects of moored point-absorber wave energy converters in a cfd-based numerical wave tank

Christian Windt, John V. Ringwood, Josh Davidson, Pál Schmitt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Computational fluid dynamics (CFD) based numerical wave tanks (NWTs) can provide valuable insight into the hydrodynamic performance of wave energy converters (WECs). Being able to capture hydrodynamic non-linearities, CFD-based NWTs (CNWTs) allow the analysis of WECs over a wide range of test conditions, such as sea states, power take-off control settings and model scale. The capabilities of a CNWT are exploited in this paper, which aims to analyse of the scaling effects of two moored point-absorber type WECs, exposed to focussed waves. To this end, three different scales are considered: 1:1, 1:10 and 1:10PWT. The latter, 1:10PWT scale, refers to the typical scale used in physical wave tanks (PWTs), complying with Froude scaling, but violating Reynolds scaling. In the 1:10 scale model, fluid viscosity is scaled, in line with the geometric properties, thereby achieving both Froude and Reynolds similitude. From the results, average differences between the three considered scales of around 5% have been observed, and the overall greatest sensitivity to scale effects can be found in the surge and pitch degree of freedom.

Original languageEnglish
Title of host publicationProceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019
EditorsJin S. Chung, Odd M. Akselsen, HyunWoo Jin, Hiroyasu Kawai, Yongwon Lee, Dmitri Matskevitch, Suak Ho Van, Decheng Wan, Alan M. Wang, Satoru Yamaguchi
PublisherInternational Society of Offshore and Polar Engineers
Pages3051-3058
Number of pages8
ISBN (Print)9781880653852
Publication statusPublished - Jun 2019
Event29th International Ocean and Polar Engineering Conference, ISOPE 2019 - Honolulu, United States
Duration: 16 Jun 201921 Jun 2019

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume3
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference29th International Ocean and Polar Engineering Conference, ISOPE 2019
CountryUnited States
CityHonolulu
Period16/06/201921/06/2019

Keywords

  • CCP-WSI Blind Test
  • CFD
  • Impulse wave maker
  • Numerical wave tank
  • OpenFOAM
  • Scaling
  • Wave Energy

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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  • Cite this

    Windt, C., Ringwood, J. V., Davidson, J., & Schmitt, P. (2019). Contribution to the ccp-wsi blind test series 3: Analysis of scaling effects of moored point-absorber wave energy converters in a cfd-based numerical wave tank. In J. S. Chung, O. M. Akselsen, H. Jin, H. Kawai, Y. Lee, D. Matskevitch, S. Ho Van, D. Wan, A. M. Wang, & S. Yamaguchi (Eds.), Proceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019 (pp. 3051-3058). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 3). International Society of Offshore and Polar Engineers.