Numerical Analysis of the Effects of Rotating Wind Turbine Blades on the Aerodynamic Forces Acting on Tower

We have investigated the effects of the rotating blades of an upwind-type three-blade horizontal-axis wind turbine (HAWT) on the basic characteristics of aerodynamic forces acting on its tower by conducting improved delayed detached-eddy simulations (DESs). Three tip-speed ratios were considered for the operating conditions of the HAWT: λ = 3 (low), λ = 6 (optimum), and λ = 10 (high). The diversion of the flow approaching the tower by the rotating blades and the low-pressure region that formed downwind of the blades significantly affected the aerodynamic forces acting on the tower. For example, the azimuth angle around the tower at which the pressure reached a maximum at each height shifted significantly in the direction of the movement of the blade passing the tower because of the diversion of the flow by the blades. Fluctuations in the lift force of the tower were significantly larger than those in its drag force because of the low-pressure region downwind of the blades.

[1]  Qiang Wang,et al.  Numerical simulation of wind turbine blade-tower interaction , 2012 .

[2]  F. Menter.  Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .

[3]  George N. Barakos,et al.  Development and Validation of a CFD Technique for the Aerodynamic Analysis of HAWT , 2009 .

[4]  Jeppe Johansen,et al.  Wind turbine rotor-tower interaction using an incompressible overset grid method , 2009 .

[5]  Soogab Lee,et al.  Influence of blade-tower interaction in upwind-type horizontal axis wind turbines on aerodynamics , 2011 .

[6]  Yuri Bazilevs,et al.  Finite element simulation of wind turbine aerodynamics: validation study using NREL Phase VI experiment , 2014 .

[7]  Sean M. Quallen.  Development and Verification of a CFD Based Simulation Software for Floating Offshore Wind Turbines , 2015 .

[8]  Nick Jenkins,et al.  Investigation of a Speed Exclusion Zone to Prevent Tower Resonance in Variable-Speed Wind Turbines , 2013, IEEE Transactions on Sustainable Energy.

[9]  Yuwei Li,et al.  Dynamic overset CFD simulations of wind turbine aerodynamics , 2012 .

[10]  Per-Åge Krogstad,et al.  An experimental and numerical study of the performance of a model turbine , 2012 .

[11]  Yuri Bazilevs,et al.  Fluid–structure interaction modeling of wind turbines: simulating the full machine , 2012, Computational Mechanics.

[12]  Per-Åge Krogstad,et al.  Experimental Results for the NOWITECH/NORCOWE Blindtest , 2012 .

[13]  Chao Yan,et al.  Comparative assessment of PANS and DES for simulation of flow past a circular cylinder , 2014 .

[14]  Earl P. N. Duque,et al.  Navier-Stokes simulations of the NREL Combined Experiment Phase II rotor , 1999 .

[15]  D. Wilcox.  Turbulence modeling for CFD , 1993 .

[16]  Jean-Jacques Chattot.  Extension of a Helicoidal Vortex Model to Account for Blade Flexibility and Tower Interference , 2006 .

[17]  P. Spalart.  Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach , 1997 .

[18]  Per-Åge Krogstad,et al.  “Blind test” calculations of the performance and wake development for a model wind turbine , 2013 .

[19]  P. Spalart,et al.  A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities , 2008 .