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Orientador(es)
Resumo(s)
The dynamics of oscillating airfoils are of great interest in many research areas such as rotor dynamics and biomimetics. The results reported in this research provide an insight into the mechanics of birds’ leading edge and how the dynamic curvature of the airfoil can highly benefit the aerodynamic and propulsive performance, especially at high angles of attack. The main goal of the current work is to numerically investigate the influence of a deflecting leading edge on the propulsive coefficients and flowfield created by a plunging airfoil at a Reynolds number of 1.4 × 104 and a constant Strouhal number of 0.15 with different ( k, ℎ) combinations. Employing a RANS approach with the proposed NACA0012-IK30 airfoil, results show that dynamically deflecting the leading edge significantly improves the propulsive efficiency of the airfoil by either reducing the required power or improving the thrust production. The outcomes regarding the propulsive efficiency show a considerable increase of up to 92% when the higher nondimensional amplitude was considered.
Descrição
Palavras-chave
Angle of attack Biomimetics Efficiency Reynolds number Aerodynamic Chord Pitching Airfoil Aerodynamic Performance Propulsive Efficiency Strouhal Numbers Reynolds Averaged Navier Stokes Pitching Moment Flow Separation Power Coefficient
Contexto Educativo
Citação
Emanuel. A. R. Camacho, Fernando M. S. P. Neves, Flávio D. Marques, Jorge M. M. Barata, André R. R. Silva Effects of a Dynamic Leading Edge on a Plunging Airfoil AIAA Aviation 2021 Forum and Exposition, Evento Online, EUA, 2-6 Agosto, 2021
Editora
American Institute of Aeronautics and Astronautics Inc