AM05-17-003 2次元はばたきモデルの空中停止における渦-翅相互作用の役割(生物流体・生体流体1,一般講演)

概要

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The motion of a mechanical model equipped with flapping wings are studied numerically. This mechanical model moves freely in a two-dimensional fluid according to the hydrodynamic force generated by vortices separated from its wings. As a result of the interaction between the vortices and the wings, the mechanical model moves steadily in a direction, even with the gravity. Without gravity, steady flapping motion of zero-mean velocity (symmetric flapping) becomes unstable when the separation vortex remains for a long time, which is controlled by artificial viscosity. With gravity, hovering, i.e., a steady flight staying in a position, can be achieved by the effective use of vortex structures enhancing the hydrodynamic force to support the gravity. The system exhibits a transition from the state with hovering to a state where hovering is impossible, as the model parameters are changed.
日本流体力学会の論文
2005-09-05