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 journalArticle

    92 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

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    Keywords

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

    ASJC Scopus subject areas

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

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