Unsteady aerodynamic simulations of floating offshore wind turbines with overset grid technology

Ping Cheng, Decheng Wan, Changhong Hu

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

6 Citations (Scopus)

Abstract

The aerodynamic performance of the floating offshore wind turbine has an extra level of complexity than that of bottom-fixed wind turbines because of the motions of the supporting platform. In this paper, the unsteady aerodynamic performance of the NREL-5MW Baseline wind turbine with periodical surge and pitch motions of its supporting platform are investigated. The three-dimensional Reynolds Averaged Navier-Stokes equations are solved for the aerodynamic numerical simulation. The naoe-FOAM-os-SJTU solver, which is based on OpenFOAM and overset grid technology and developed for ship and ocean engineering problems, is employed. From the simulation, the time series of the unsteady torque and thrust are obtained, together with the detailed information of the wake flow field, and the pressure coefficient distribution in different cross-section are also available to clarity the detailed flow filed information. The simulation results are compared both with those obtained from aerodynamic simulation of wind turbine without effects of platform motions, and with other approaches in previous studies. The simulation results show that the pitch motion has more significant effects on the aerodynamic forces and moments of the rotor than the surge motion does. And the motion of the platform especially the pitch motion may bring very bad influence on the turbine forces and wake flow, even on the power generation in case of very severe pitch motion.

Original languageEnglish
Title of host publicationProceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016
EditorsAlan M. Wang, Jin S. Chung, Ted Kokkinis, Michael Muskulus
PublisherInternational Society of Offshore and Polar Engineers
Pages391-398
Number of pages8
ISBN (Electronic)9781880653883
Publication statusPublished - Jan 1 2016
Event26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016 - Rhodes, Greece
Duration: Jun 26 2016Jul 1 2016

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume2016-January
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016
CountryGreece
CityRhodes
Period6/26/167/1/16

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All Science Journal Classification (ASJC) codes

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

Cite this

Cheng, P., Wan, D., & Hu, C. (2016). Unsteady aerodynamic simulations of floating offshore wind turbines with overset grid technology. In A. M. Wang, J. S. Chung, T. Kokkinis, & M. Muskulus (Eds.), Proceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016 (pp. 391-398). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2016-January). International Society of Offshore and Polar Engineers.