Analysis of flow-induced performance change of cycloidal rotors: Influence of pitching kinematic and chord-to-radius ratio

As a new type of the propulsive devices, cycloidal rotor has been attracting more attention recently. The present work concentrates on analysis performance and internal flow field two-bladed operating at low Reynolds numbers, with special emphasis understanding how structure affects different working conditions. symmetrical/asymmetrical pitching motions are evaluated initially primary results show that asymmetrical mean angle 5° improves efficiency rotating system. Then, effect chord-to-radius ratio three conditions is discussed, which shows 0.45 best value to maximise performance. pattern, involving blade-wake interaction, wake-wake vortex structures blade surface, roll-up vortices inside laminar boundary layer, separation bubble, leading-edge vortex, trailing-edge discussed in detail under various study single blade, forces (lift drag) distributions, loadings near-wall flows two blades, provide global change propeller.