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Performance Estimation of a Tidal Turbine with Blade Deformation Using Fluid-Structure Interaction Method
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 Title & Authors
Performance Estimation of a Tidal Turbine with Blade Deformation Using Fluid-Structure Interaction Method
Jo, Chul-Hee; Hwang, Su-Jin; Kim, Do-Youb; Lee, Kang-Hee;
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The turbine is one of the most important components in the tidal current power device which can convert current flow to rotational energy. Generally, a tidal turbine has two or three blades that are subjected to hydrodynamic loads. The blades are continuously deformed by various incoming flow velocities. Depending on the velocities, blade size, and material, the deformation rates would be different that could affect the power production rate as well as turbine performance. Surely deformed blades would decrease the performance of the turbine. However, most studies of turbine performance have been carried out without considerations on the blade deformation. The power estimation and analysis should consider the deformed blade shape for accurate output power. This paper describes a fluid-structure interaction (FSI) analysis conducted using computational fluid dynamics (CFD) and the finite element method (FEM) to estimate practical turbine performance. The loss of turbine efficiency was calculated for a deformed blade that decreased by 2.2% with maximum deformation of 216mm at the blade tip. As a result of the study, principal causes of power loss induced by blade deformation were analysed and summarised in this paper.
Ocean renewable energy;Tidal current power;Horizontal axis tidal turbine;Blade deformation;Fluid-structure interaction method;
 Cited by
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