کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
300064 512468 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Predicting wind turbine blade loads and aeroelastic response using a coupled CFD–CSD method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Predicting wind turbine blade loads and aeroelastic response using a coupled CFD–CSD method
چکیده انگلیسی


• A coupled CFD–CSD method is presented for aeroelastic analyses of HAWT rotor blades.
• Effects of blade deformation on the rotor blade airloads are investigated.
• Blade airloads are significantly reduced by nose-down blade torsion.
• Nose-down torsion also alters the unsteady blade airload behaviors.
• Tower interference induces oscillatory blade deformations and vibratory loads.

The aeroelastic response and the airloads of horizontal-axis wind turbine rotor blades were numerically investigated using a coupled CFD–CSD method. The blade aerodynamic loads were obtained from a Navier–Stokes CFD flow solver based on unstructured meshes. The blade elastic deformation was calculated using a FEM-based CSD solver which employs a nonlinear coupled flap-lag-torsion beam theory. The coupling of the CFD and CSD solvers was accomplished in a loosely coupled manner by exchanging the information between the two solvers at infrequent intervals. At first, the present coupled CFD–CSD method was applied to the NREL 5MW reference wind turbine rotor under steady axial flow conditions, and the mean rotor loads and the static blade deformation were compared with other predicted results. Then, the unsteady blade aerodynamic loads and the dynamic blade response due to rotor shaft tilt and tower interference were investigated, along with the influence of the gravitational force. It was found that due to the aeroelastic blade deformation, the blade aerodynamic loads are significantly reduced, and the unsteady dynamic load behaviors are also changed, particularly by the torsional deformation. From the observation of the tower interference, it was also found that the aerodynamic loads are abruptly reduced as the blades pass by the tower, resulting in oscillatory blade deformation and vibratory loads, particularly in the flapwise direction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 70, October 2014, Pages 184–196
نویسندگان
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