Formulation of reduced-order models for blade-vortex interactions using modified Volterra kernels
The theory of Volterra integral series for nonlinear systems is applied to the prediction of the aerodynamic response of an NACA 0012 airfoil experiencing blade-vortex interaction. The phenomenon is modeled in two-dimensions using Euler/Navier-Stokes description of the flow. The resulting unsteady lift time sequences are appropriately combined to form a training dataset to identify the Volterra kernels that characterize the reduced-order model based on the Volterra integral series. Next, the response predicted by the reduced-order model is compared to new data produced by the Euler/Navier-Stokes simulations to which the reduced-order model has never been exposed. The lift time histories predicted by the reduced-order model and the corresponding Euler/Navier-Stokes simulations are shown to be in respectable agreement.
|Conference||30th European Rotorcraft Forum|
Wong, A. (Angela), Nitzsche, F, & Khalid, M. (Mahmood). (2005). Formulation of reduced-order models for blade-vortex interactions using modified Volterra kernels. In 30th European Rotorcraft Forum (pp. 69–79).