Dynamics and hydrodynamic efficiency of diving beetle while swimming

Date

2023-03-05

Supervisor/s

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Department

Type

Article

ISSN

2405-8440

Format

Free to read from

Citation

Qi D, Zhang C, Wu Z, et al., (2023) Dynamics and hydrodynamic efficiency of diving beetle while swimming. Heliyon, Volume 9, Issue 3, March 2023, Article number e14200

Abstract

Diving beetle, an excellent biological prototype for bionic underwater vehicles, can achieve forward swimming, backward swimming, and flexible cornering by swinging its two powerful hind legs. An in-depth study of the propulsion performance of them will contribute to the micro underwater vehicles. In this paper, the kinematic and dynamic parameters, and the hydrodynamic efficiency of the diving beetle are studied by analysis of swimming videos using Motion Capture Technology, combined with CFD simulations. The results show that the hind legs of diving beetle can achieve high propulsion force and low return resistance during one propulsion cycle at both forward and backward swimming modes. The propulsion efficiencies of forward and backward swimming are 0.47 and 0.30, respectively. Although the efficiency of backward swimming is lower, the diving beetle can reach a higher speed in a short time at this mode, which can help it avoid natural enemies. At backward swimming mode, there is a long period of passive swing of hind legs, larger drag exists at higher speed during the recovery stroke, which reduces the propulsion efficiency to a certain extent. Reasonable planning of the swing speed of the hind legs during the power stroke and the recovery stroke can obtain the highest propulsion efficiency of this propulsion method. This work will be useful for the development of a bionic propulsion system of micro underwater vehicle.

Description

Software Description

Software Language

Github

Keywords

Diving beetle, Propulsion force, Drag force, Added mass force, Hydrodynamic efficiency

DOI

Rights

Attribution 4.0 International

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Funder/s