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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2021 Volume 47, Issue 22, Pages 24–27 (Mi pjtf4623)

Aperture effect of normal hovering flight in close proximity to the ground

Xinping Zhouab, Yong Huangbc

a School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China
b Department of Mechanics, Huazhong University of Science and Technology, Wuhan, PR China
c Luoyang Ship Material Research Institute, Luoyang, PR China

Abstract: Aerodynamics of a flapping foil at low Reynolds number in close proximity to the ground in aperture effect are studied by numerical simulations based on the normal hovering motion mode. A vortex street is interestingly generated by both ground and aperture effects and the rotation of the foil. The study reveals that the aperture takes a force-reduction effect and a large enough aperture effectively can remove the ground force-enhancement effect produced when the foil is in close proximity to the ground. This paper provides an effective method of optimizing foil-flapping flight design of flying robotics over a porous plane.

Keywords: aerodynamics, flapping foil, low Reynolds number, ground effect, aperture effect.

Received: 31.03.2021
Revised: 31.03.2021
Accepted: 30.07.2021

DOI: 10.21883/PJTF.2021.22.51722.18796



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