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

Takizawa, Kenji; Henicke, Bradley; Montes, Darren; Tezduyar, Tayfun; Hsu, Ming-Chen; Bazilevs, Yuri
December 2011
Computational Mechanics;Dec2011, Vol. 48 Issue 6, p647
Academic Journal
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.


Related Articles

  • Stabilized space-time computation of wind-turbine rotor aerodynamics. Takizawa, Kenji; Henicke, Bradley; Tezduyar, Tayfun; Hsu, Ming-Chen; Bazilevs, Yuri // Computational Mechanics;Sep2011, Vol. 48 Issue 3, p333 

    We show how we use the Deforming-Spatial-Domain/Stabilized Space-Time (DSD/SST) formulation for accurate 3D computation of the aerodynamics of a wind-turbine rotor. As the test case, we use the NREL 5MW offshore baseline wind-turbine rotor. This class of computational problems are rather...

  • Space-time VMS computation of wind-turbine rotor and tower aerodynamics. Takizawa, Kenji; Tezduyar, Tayfun; McIntyre, Spenser; Kostov, Nikolay; Kolesar, Ryan; Habluetzel, Casey // Computational Mechanics;Jan2014, Vol. 53 Issue 1, p1 

    We present the space-time variational multiscale (ST-VMS) computation of wind-turbine rotor and tower aerodynamics. The rotor geometry is that of the NREL 5MW offshore baseline wind turbine. We compute with a given wind speed and a specified rotor speed. The computation is challenging because of...

  • Scalar flux spectrum in isotropic steady turbulence with a uniform mean gradient. Watanabe, Takeshi; Gotoh, Toshiyuki // Physics of Fluids;Dec2007, Vol. 19 Issue 12, p121701 

    The scaling law of a scalar flux spectrum (velocity-scalar cospectrum) in the inertial convective range of passive scalar turbulence under a uniform mean scalar gradient is examined using direct numerical simulation with a resolution of up to 20483 grid points. When the Reynolds number Reλ is...

  • Influence of Reynolds Number on Multi-Objective Aerodynamic Design of a Wind Turbine Blade. Ge, Mingwei; Fang, Le; Tian, De // PLoS ONE;11/3/2015, Vol. 10 Issue 10, p1 

    At present, the radius of wind turbine rotors ranges from several meters to one hundred meters, or even more, which extends Reynolds number of the airfoil profile from the order of 105 to 107. Taking the blade for 3MW wind turbines as an example, the influence of Reynolds number on the...

  • The Role of Free-Stream Turbulence on Flow Evolution in the Wake of a VAWT Blade. Ahmadi-Baloutaki, M.; Ting, D. S-K.; Carriveau, R. // Wind Engineering;Aug2013, Vol. 37 Issue 4, p401 

    Turbulence evolution in the near wake of a VAWT blade at a constant Reynolds number of 80,000 and an angle of attack of 14 degrees has been studied experimentally under two different levels of free-stream turbulence, 0.5 and 4.6%. Mean velocity, turbulence intensity, turbulence rms velocity and...

  • Numerical Investigations on Dynamic Stall Control with Passive Elements. Frunzulica, Florin; Dumitrache, Alexandru; Suatean, Bogdan // AIP Conference Proceedings;2015, Vol. 1648 Issue 1, p1 

    In this paper we investigated numerically the possibilities to control the dynamic stall phenomenon, with application to vertical axis wind turbines (VAWT). The dynamic stall appears at low tip speed ratio (TSR<4) and it has a great impact on structural integrity of the wind turbine and power...

  • Direct Numerical Simulation of Turbulence Characteristics Generated by Fractal Grids. Nagata, Kouji; Suzuki, Hiroki; Sakai, Yasuhiko; Hayase, Toshiyuki; Kubo, Takashi // International Review of Physics;Dec2008, Vol. 2 Issue 6, p400 

    Turbulence characteristics in the spatially developing fractal-generated turbulence are investigated by means of the direct numerical simulation (DNS). Following the experiments by Hurst & Vassilicos (Physics of Fluids 19, 035103, 2007), three kinds of fractal grids, namely, cross, I and square...

  • Effect of Dynamic Stall, Finite Aspect Ratio and Streamtube Expansion on VAWT Performance Prediction using the BE-M Model. Raciti Castelli, M.; Fedrigo, A.; Benini, E. // World Academy of Science, Engineering & Technology;2012, Issue 68, p488 

    A multiple-option analytical model for the evaluation of the energy performance and distribution of aerodynamic forces acting on a vertical-axis Darrieus wind turbine depending on both rotor architecture and operating conditions is presented. For this purpose, a numerical algorithm, capable of...

  • Effect of Relative Thickness on Improving Airfoil Aerodynamic Performance by Blunt Trailing-Edge Modification. Xu Zhang; Wei Li; Chengcheng Kong // Advances in Mechanical Engineering (Hindawi Publishing Corporati;2014, p1 

    A numerical study on the aerodynamic performance of wind turbine airfoils and their modifications has been carried out to understand the effects of maximum relative thickness and its position on the lift enhancement of blunt trailing-edge modification. First, the airfoils (NACA4409, NACA4412,...


Read the Article


Sign out of this library

Other Topics