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Indexed by:期刊论文

Date of Publication:2018-07-01

Journal:PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE

Included Journals:SCIE

Volume:232

Issue:14,SI

Page Number:2524-2535

ISSN No.:0954-4062

Key Words:3D bionic fish; swimming control; turning manoeuvre; vorticity dynamics

Abstract:Numerical simulations of the turning manoeuvre of a 3D bionic fish in a viscous flow are conducted in the present study using a 3D computational fluid dynamics package, which includes the adaptive multi-grid finite volume method, the immersed boundary method, the volume of fluid method, and the control strategy of fish swimming. The 3D bionic fish can turn quickly primarily using the directional control strategy of the swing of the head, in which the impacts of the swing of the fish body and the caudal fin on the directional control are also taken into account. This result demonstrates that the directional control strategy of the swing of the head is effective. An in-depth analysis of the fluid mechanism of the swimming manoeuvre of the 3D bionic fish reveals that the rotation moment in favour of turning motion is obtained by the pressure around the body of the fish, which is induced by the wake vortex, and the swing of the fish can manipulate the location and the strength of vortices shed from the fish body.