The aerodynamics of oscillating airfoils are crucial to understanding subjects such as rotor dynamics and bio-inspired flows. Unsteady airfoils have been studied extensively, but there is an overall lack of knowledge regarding newer and more complex kinematics. The present paper builds upon our modified version of the NACA0012 by numerically comparing its way of flapping with the standard flapping that is common in the literature. The comparison is conducted parametrically at a Reynolds number of 104 for two nondimensional amplitudes. Then, using a gradient-based optimization method, we search for pitching amplitudes that maximize the propulsive power and efficiency for both flapping modes. Results indicate that the proposed flapping methodology is more promising than conventional flapping, with thrust increases up to approximately 40%. Furthermore, the proposed mechanism achieves maximum propulsive power with near-optimal efficiency, a common limitation of traditional flapping airfoils.
Optimal leading-edge deflection for flapping airfoil propulsion
01.12.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Propulsion of flapping and oscillating airfoil
Engineering Index Backfile | 1936
|Propulsion of a flapping and oscillating airfoil
TIBKAT | 1936
|Propulsion of a flapping and oscillating airfoil
NTRS | 1937
|Flexible Flapping Airfoil Propulsion at Low Reynolds Numbers
British Library Conference Proceedings | 2005
|