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The idea of Airborne Wind Energy (AWE) is to generate power by flying a tethered airfoil across the windflow. Tethered flight is a fast, strongly nonlinear, unstable and constrained process, motivating control approaches based on fast Nonlinear Model Predictive Control (NMPC) and state estimation approaches based on Moving Horizon Estimation (MHE). In particular, the start-up phase of AWE systems...
Ice accretion leads to significant deterioration of aircraft aerodynamic performance and handling qualities. In this paper, ice accretion on NACA 0012 airfoil and multi-element airfoils are predicted using CFD method. Using a multi-block grid technique, we generate computational grids for the multi-element airfoils. A four-stage Runge-Kutta method is used to solve the droplet trajectory equation,...
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