Abstract
In this paper, the dynamic behavior of a one-stage bevel gear used in vertical axis wind turbine in transient regime is investigated. Linear dynamic model is simulated by fourteen degrees of freedom. Gear excitation is induced by external and internal sources which are, respectively, the aerodynamic torque caused by the fluctuation of input wind speed in transient regime and the variation of gear mesh stiffness. In this study, the differential equations governing the system motion are solved using an implicit Newmark algorithm. In fact, there are some design parameters, which influence the performance of vertical axis wind turbine. In order to get the appropriate aerodynamic torque, the effect of each parameter is studied in this work. It was found that the rotational speed of the rotor shaft has a significant effect on the aerodynamic torque performance.
Highlights
Vertical axis wind turbines (VAWT) have a particular architecture compared with horizontal ones. ey are composed of two main parts: the blade rotor in vertical position and a mechanical gear transmission
Plenty of authors studied the aerodynamic performance of Darrieus-type of vertical axis wind turbines (VAWT). ere are two mainly approaches: momentum models and Computational Fluid Dynamics (CFD). e main benefit of momentum models is that their time of resolution is quicker than the other approach
E main objective of the present work is to predict the dynamic behavior of the one-stage straight bevel gear system used in vertical axis wind turbine and powered by two main sources of excitation which are the optimum aerodynamic torque selected through parametrical study and the periodic variation of the gear meshes’ stiffness
Summary
Bacem Zghal , Imen Bel Mabrouk, Lassâad Walha, Kamel Abboudi, and Mohamed Haddar. Laboratory of Mechanical Modeling and Production (LA MP), National School of Engineers of Sfax (ENIS), University of Sfax, BP , , Tunisia. The dynamic behavior of a one-stage bevel gear used in vertical axis wind turbine in transient regime is investigated. Gear excitation is induced by external and internal sources which are, respectively, the aerodynamic torque caused by the fluctuation of input wind speed in transient regime and the variation of gear mesh stiffness. There are some design parameters, which influence the performance of vertical axis wind turbine. In order to get the appropriate aerodynamic torque, the effect of each parameter is studied in this work. It was found that the rotational speed of the rotor sha has a significant effect on the aerodynamic torque performance
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