RT Journal Article
T1 Dynamic Response of Low-Aspect-Ratio Cantilever NACA0012 Airfoil at Low-To-Moderate Reynolds Numbers
A1 García-González, Antonio Luis
A1 Martínez-Aranda, Sergio
A1 Velázquez-Navarro, José Francisco
A1 Parras-Anguita, Luis
A1 Del-Pino-Peñas, Carlos Manuel
K1 Aerodinámica
AB The influence of the angle of attack (AoA) and the chord based Reynolds number (Rec) on the lift and drag coefficients has been analyzed experimentally in a low-aspect-ratio NACA0012 airfoil, AR 2. Results are shown for chord based Reynolds numbers in the range 3.33×104 ≤Rec ≤1.33×105 and AoA between 0º and +35º, the stall angle being close to 12º. The aerodynamic characteristics show an increase and decrease of lift and drag force fluctuations for AoA greater than the stall angle. The explanation of how these aerodynamic variations appear has been reported numerically and it is based on two-dimensional effects which are mainly the unstable laminar separation bubble (LSB) and the subsequent downstream propagation of leading edge vortex (LEV) as AoA increases. In addition, the dynamic response of the wing has been studied using frequency analysis. We compute the power spectral density (PSD) from the temporal evolution of the net force exerted over the wing, showing that the main response of the wing is the presence of two natural frequencies of the wing-base system. The mean PSDsuddenly increases for Rec ≈1×105, particularly at AoA exceeding the critical point that corresponds to the stall angle. Finally, and despite from the fact that our model is rigid, we find PSD peaks at very low and high frequencies in agreement with other authors’ results which correspond to energetic modes in the wingtip vortex and the formation and emission of coherent turbulent structures behind the airfoil, respectively.
PB Springer
YR 2018
FD 2018
LK https://hdl.handle.net/10630/30349
UL https://hdl.handle.net/10630/30349
LA eng
NO Martínez-Aranda, S., García-González, A., Parras, L. et al. Dynamic Response of Low-Aspect-Ratio Cantilever NACA0012 Airfoil at Low-To-Moderate Reynolds Numbers. Int. J. Aeronaut. Space Sci. 19, 584–594 (2018). https://doi.org/10.1007/s42405-018-0054-y
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026