Numerical Modeling and Analysis of a Horizontal Axis RM1 NACA-4415 Wind Turbine
DOI:
https://doi.org/10.37934/cfdl.15.3.111Keywords:
Wind Turbine, Turbine blade, cfd, Fluid structure interaction, Structural analysis, Modal analysisAbstract
Wind turbines are widely used for conversion of the wind power into mechanical energy. The failure of the blade during operation is a common phenomenon which can lead to the degradation of the power output. Modeling and analysis of wind turbine blade is critical for the design and safe and efficient operation. In this study, a one-way coupled Finite Element (FE) scale model of RM1 SAFL turbine is developed to simulate structural integrity and deformations in the blades. The study is primarily focusses on the strength and deformation of the blades under varying wind speeds ranging from 5 m/s to 30 m/s. The wind turbine blades were modelled from aluminum alloy and unidirectional carbon reinforced composite (epoxy carbon). The results obtained from numerical simulation demonstrated higher stresses and blade tip deformation in blades from composite compared to aluminum AL 6061 alloy. Maximum displacements were calculated at the tip of blades and were well under the threshold level. The maximum stress intensity was found in the center of the blades. On the basis of the current geometry, modal analysis of turbine blades was performed and benchmark cases for the dynamic response were investigated. The natural frequency for aluminum alloy was calculated to be almost three time higher than of composite material structure. The modal in case of composite material was approximately 35% of that obtained using aluminum alloy. This study suggests further analysis to predict surface integrity of the turbine blades under more volatile wind conditions
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