Rüzgâr türbinlerinden elde edilen enerji miktarı her geçen gün artmaktadır. türbinlerinin güç çıkışlarını etkileyen faktörlerden birisi de kanat profilleridir. Bu çalışmada rüzgâr türbinlerinde kullanılan farklı (NACA 0009, NACA 2415, 4415, 4424, 6412, 6415, 24112, FX 63-137, GOE 795, NREL’s S824, SD 5060, SG6040) profillerinin Qblade yazılımı kullanılarak simülasyonları oluşturulup sayısal ana...

Linear unsteady aerodynamic models are obtained for a NACA 0006 airfoil in a wind tunnel experiment at Reynolds number 65,000. A family of system identification maneuvers, based on a canonical step-up, hold maneuver, are specifically designed to extract relevant unsteady information from phase averaged wind tunnel measurements. Linear models based on these maneuvers are constructed using OKID/E...

We consider the numerical simulation of rigid body motion in multiphase incompressible Navier-Stokes flow. The motion is formulated as an optimization problem and determined by minimizing an objective function in terms of forces and moments acting on the body, constrained by the multiphase Navier-Stokes equations. The corresponding adjoint system and boundary conditions are derived and derivati...

Nonlinear model reduction is a critical component in the design process of control strategies for complex flows in the nonlinear regime. A Galerkin projection based on POD-modes is developed in this study that takes advantage of multiple bases for particular components of the governing equations. These bases are then linked by the Discrete Empirical Interpolation Method (DEIM) to ultimately arr...

A two-dimensional nonlinear aerodynamics representation analysis is proposed for the investigation of inviscid flowfields of unsteady airfoils. Such problems are reduced to the solution of a nonlinear multidimensional singular integral equation as the source and vortex strength distributions are dependent on the history of these distributions on the NACA airfoil surface. A turbulent boundary la...

We discuss our preliminary experiences with several parallel two level additive Schwarz type domain decomposition methods for the simulation of three dimensional transonic compressible ows The focus is on the implementation of the parallel coarse mesh solver which is used to reduce the computational cost and speed up the convergence of the linear algebraic solvers Results of a local two level a...