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CFD Investigations for UAV and MAV Low Speed Airfoils Characteristics

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Investigating of the drag and lift forces for low speeds airfoils is of great importance in the aerodynamics design problems such as UAV and MAV. Determining such forces through experiments using wind tunnel testing is quite laborious & costly. Thus the CFD may be considered a reliable alternative in determining drag and lift. For low speed airfoils, the viscous effects dominate the effects of turbulence near airfoil surface. Thus selection of the turbulence model and grid are very sensitive case. The numerical simulations for the NACA 23012C airfoil are validated with experimental testing for different angles of attack. Results for seven different turbulence models are presented and compared. Four different grid types (SG, TG, HYP1 and HYP2) are inspected to have the best agreement of the (model) with those of the experiments.
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Low Speeds Airfoil; Turbulence Model; Numerical Simulations; Grid Sensitivity

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