Bio-inspired nano rotor investigation based on UVLM

摘要

Nano rotor is of great value in military and civilian applications. Due to its nano size, it works at an ultra-lowReynolds number and aerodynamic performance deteriorates dramatically. The bio-inspired nano rotor is carried outto improve the rotor propulsive performance. Unsteady vortex lattice method (UVLM) model is established fullyconsidering the influence of induced drag and wake vortex distortion on aerodynamic forces. The aim is to quickly andaccurately simulate the flow field around the bio-inspired nano rotor and to efficiently perform the aerodynamiccalculation to optimise the design of the bio-inspired rotor. The rotor parameters and motion parameters such asaspect ratio, taper ratio and camber are studied using UVLM. It is found that the aerodynamic performance of the rotorincreased with the aspect ratio. The quality factor changes parabolically with the taper ratio and camber, and there isan optimal value for the ratio and camber, respectively. The influences of pitching angle and frequency areinvestigated as well. Results show that the bio-inspired motion improves the propulsion performance of nano rotor.