Numerical Simulation and Parameter Variation of Insect Wing Motion based on Dragonfly Hovering

The flapping motion of a wing based on the hind-wing of the Aeschna juncea dragonfly is simulated using a 3D incompressible Navier Stokes solver. The performance of the wing is investigated by variation of a number of kinematic parameters. Flapping amplitudes of between 10° to 60° (half-angle) and frequencies of 1 to 300 Hz are considered, resulting in a Reynolds number range of 100 to 50,000. The flapping amplitude observed for Aeschna juncea is shown to maximize the ratio of mean vertical force produced to power required.

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