Investigations of Oscillation Parameters and Effect of Aspect Ratio on Plunging Motion of Rigid Wing in MAVs Reynolds Numbers

In this research, the plunging motion of wing in unsteady incompressible and laminar flow is simulated by a numerical method based on finite volume technique and using dynamic mesh. The effects of amplitude, reduced frequency and aspect ratio on the trust generation in MAVs and Fishes Reynolds number region, are investigated. For simulating this oscillating wing, dynamic mesh with rigid body motion is applied. The simulation results are compared with published data to confirm the validity of this research. In this simulation, the effect of reduced frequency, amplitude, their simultaneous effect of them and the effect of aspect ratios investigated. These simulations are in Reynolds 3000 and some aspect ratios, reduced frequencies and amplitudes. This simulation results show that by increasing reduced frequency and amplitude, relative angle of attack increases, which increase pressure deference around the wings. Results showed that increase in reduced frequency is of more importance than the increase in the amplitude because of more acceleration. Low aspect ratio of the wing has negative effect on the production of trust force due to backflow of wing tips.