Paper Title
Use Of CFD Methods For The Aeroelastic Study Of Wind Turbine Blade

Abstract: Unsteady three-dimensional Reynolds averaged Navier-Stokes solver (IMPRANS) is used for the simulating quasi-steady flow around wind turbine blades. IMPRANS is based on an implicit finite volume nodal point scheme with Baldwin-Lomax algebraic eddy viscosity model for turbulence closure. The governing equations for the moving domain are solved using the dual time stepping procedure in an inertial frame of reference. In-house designed 500 kW Horizontal-Axis Wind Turbine blade with customized aerofoils are analyzed using IMPRANS for various wind speeds and different flexed blade shapes due to aeroelastic effects. The analysis shows that the power increases for the rated wind speed of 12[m/s] due to flexure. While the extent of power increase is different for different wind speeds, the power actually decreases for 20 [m/s] case. The results are compared with those of Panel Method which is an inviscid linear code. In general, the trends agree well and the incremental effects can be used effectively for design estimates.