Bulletin of the American Physical Society
75th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 20–22, 2022; Indiana Convention Center, Indianapolis, Indiana.
Session Z03: Aerodynamics: Fluid-Structure Interactions, Membranes, Flutter III
12:50 PM–2:47 PM,
Tuesday, November 22, 2022
Chair: Daniel Bodony, University of Illinois at Urbana-Champai
Abstract: Z03.00003 : Aerodynamic stability of a wind turbine section including dynamic stall and dynamic inflow
1:16 PM–1:29 PM
In this work, we include a dynamic stall model and a dynamic inflow model in state-space form. The dynamic inflow model accounts for slow variation of induced velocities in wind energy applications. The airfoil section is modeled as a rigid body, but the location of the center of mass, shear center, elastic axis, and aerodynamic center are parameters of the model, and the direction of the principal axes of inertia and elasticity are not assumed to coincide with the chord axis.
We present the equations of the aero-elastic state space model and linearize them. We analyse the problem in time and frequency domain and study the parameters affecting the stability of the airfoil section. In particular, we study the influence of the locations of the different structural points and the point where the angle of attack is defined. The stiffnening and damping contributions from the aerodynamics are assessed.
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