Dynamic study of a wind turbine blade with horizontal axis |
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| Affiliation: | 1. Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint-Pietersnieuwstraat 41, 9000, Ghent, Belgium;2. Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark-Zwijnaarde 907, 9052, Zwijnaarde, Belgium;3. Flanders Make, Belgium;1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China;2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), China;4. Hunan Provincial Engineering Laboratory of Wind Power Operation, Maintenance and Testing, Hunan Institute of Engineering, Xiangtan, 411104, China;1. Department of Mechanical Engineering, The University of Lahore, Main Campus, 1-KM Raiwind Road, Lahore, Pakistan;2. Acciona Windpower S.A., Avenida Ciudad de la Innovación 3, 31621 Sarriguren, Navarra, Spain;3. Department of Mechanical Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;1. Mechanical of Materials and Industrial Maintenance Laboratory LR3MI, Mechanical Engineering Department, Badji Mokhtar University, Annaba, PB 12, Annaba 23000, Algeria;2. Wind Energy Research Laboratory, University of Québec at Rimouski 300, allée des Ursulines, C.P. 3300, Rimouski, Québec, Canada G5L 3A1;3. Energy and Turbomachinery Laboratory, Mechanical Engineering Department, University of Tébessa, Constantine Road, Tébessa 12002, Algeria |
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| Abstract: | The study of the dynamic behavior of a wind turbine with horizontal axis can be undertaken by various methods of analysis. The effects of the change of the aerodynamic flow (in the steady and unsteady cases), the variation of parameters of the cinematic movement (angle of attack, pitch angle and yaw angle) and the definition of subsystems characteristics that makes the wind turbine (blade, nacelle and pylon) allow one to characterize the structural dynamic behavior of the wind turbine. It is therefore necessary to develop these items. Once this is done, the structural dynamic behavior of the system can be improved. The term `improve' means the increase of the life duration by mastering the fatigue effects and the reduction of cost without sacrificing the aerodynamic output. The present study aims to examine the behavior of the blade, which is the main part of the wind turbine in that it that transmits forces to all other parts of the structure. The model is based on the theory of three-dimensional beams, under the assumption of variable sections of the type NACA 4415 airfoil, and takes into account membrane, transversal shear, flexion and free torsion effects. With regards to the aerodynamic loads (the lift, the drag and the pitching moment), a validation has been undertaken by considering experimental data and numerical results obtained by a CFD code (Fluent). The forces are obtained by means of a parametric CAD method interpolation of the aerodynamic poles by Bézier patch under geometrical constraints solved by a Simplex type algorithm. The emphasis is put on dynamic aspects by a complete processing of the dynamic equilibrium equation, applied to the wind turbine blade with horizontal axis. |
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