{'fraction_non_alphanumeric': 0.021848739495798318, 'fraction_numerical': 0.0025210084033613447, 'mean_word_length': 5.543956043956044, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Aerodynamic Performance of Dragonfly-Inspired Corrugated Airfoils

Biomimicry is finding solutions to human design problems by taking inspiration from nature's strategies, developed from millions of years of evolution. A dragonfly's aerial maneuverability has been a popular topic of research, inspiring developments from micro aviation vehicles (MAV's) down to microchip applications. This study aims to investigate what part of a dragonfly's wing structure gives it superior aerodynamic advantages which can be used to improve current aircraft technologies. Two different types of surface corrugations were compared against a standard smooth airfoil of the same underlying shape. The corrugated skin displayed similar characteristics to the control airfoil, with a small reduction in the peak lift to drag ratio of 7.3%. In addition, the corrugated nature produced the desired effects of delaying stall by 4°, reducing potentially harmful post-stall effects. The top corrugated surface gave a positive pitching moment and appeared to be the reason that dragonflies have superior maneuverability, however, the lift to drag ratio was reduced by half, compared to the smooth control airfoil.