Numerical investigation of an insect-scale flexible wing with a small amplitude flapping kinematics

To maintain flight, insect-scale air vehicles must adapt to their low Reynolds number flight conditions and generate sufficient aerodynamic force. Researchers conducted extensive studies explore the mechanism of high efficiency on such a small scale. In this paper, centimeter-level flapping wing is used investigate feasibility whether simple motion with certain frequency can enough lift. The unsteady numerical simulations are based fluid structure interaction (FSI) method dynamic mesh technology. in harmonic law amplitude frequency, which corresponds driven by piezoelectric actuator. inertial forces cause chordwise torsion, thereby generating vertical concerned refers structural modal FSI frequency. According results, we find that under condition ratio 1.0, is, when flaps at first-order deformation degree highest, but it does not produce good performance. However, 0.822, achieve highest equal 0.273. Under 0.6, smaller than effectively utilizes strain energy storage release produces maximum coefficient 4.86. study shows satisfy requirements lift sustain