Analysing the Aerodynamic Performance of Dragonfly-Inspired Wing in Forward Flight: A Computational Approach

This paper presents a numerical investigation into the forward flight dynamics of a dragonfly-inspired wing. A three-dimensional (3-D) profiled wing model, specifically the right hind wing, was utilized for simulations. The wing model featured a tapering thickness from the wing root to the wing tip and from the leading edge to the trailing edge, replicating the morphological characteristics observed in dragonfly wings. Morphological data were acquired using a digital micrometre instrument, DSLR camera and Scanning Electron Microscope. The study aimed to evaluate the impact of advance ratio on the aerodynamic performance of the dragonfly-inspired wing during forward flight. Analysis was conducted on a single-degree-of-freedom flapping mechanism, with a flapping frequency set at 36 Hz to mimic the natural wingbeat frequency of a dragonfly. Results revealed a notable pressure disparity between the upper and lower surfaces during the downstroke, indicative of substantial lift generation during flapping motion. Additionally, the visualization of the leading-edge vortex formation provided further insights into the aerodynamic mechanisms at play. Overall, this study contributes valuable insights into the aerodynamic performance of insect-scale flapping wing micro air vehicles, offering potential advancements in their design and development.