Numerical-performance studies for the stabilized space-time computation of wind-turbine rotor aerodynamics

Kenji Takizawa, Bradley Henicke, Darren Montes, Tayfun E. Tezduyar, Ming Chen Hsu, Yuri Bazilevs

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)

Abstract

We present our numerical-performance studies for 3D wind-turbine rotor aerodynamics computation with the deforming-spatial-domain/stabilized space-time (DSD/SST) formulation. The computation is challenging because of the large Reynolds numbers and rotating turbulent flows, and computing the correct torque requires an accurate and meticulous numerical approach. As the test case, we use the NREL 5MW offshore baseline wind-turbine rotor. We compute the problem with both the original version of the DSD/SST formulation and the version with an advanced turbulence model. The DSD/SST formulation with the turbulence model is a recently-introduced space-time version of the residual-based variational multiscale method. We include in our comparison as reference solution the results obtained with the residual-based variational multiscale Arbitrary Lagrangian-Eulerian method using NURBS for spatial discretization. We test different levels of mesh refinement and different definitions for the stabilization parameter embedded in the "least squares on incompressibility constraint" stabilization. We compare the torque values obtained.

Original languageEnglish
Pages (from-to)647-657
Number of pages11
JournalComputational Mechanics
Volume48
Issue number6
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • DSD/SST formulation
  • Rotating turbulent flow
  • Space-time variational multiscale method
  • Torque values
  • Wind-turbine aerodynamics

ASJC Scopus subject areas

  • Computational Mechanics
  • Ocean Engineering
  • Mechanical Engineering
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

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