Hydrodynamic performance of manta rays under different motion parameter

Abstract This paper presents a numerical simulation of the steady propulsion state manta rays and investigates influence single motion parameters addition perturbation signals on hydrodynamic characteristics vortex evolution rays. A model equations ray were established by observing living organisms, then computational method combining immersed boundary (IBM) Sphere function-based Gas Kinetic Scheme (SGKS) was used to simulate active ray. The results show that in parameter, as frequency increases, thrust force increases subsequently, but efficiency decreases; with increase amplitude, also reaches maximum at dimensionless amplitude 0.35; wavenumber its 0.4, subsequently. When same low-frequency sinusoidal is added, both decrease when less than or equal greater 0.6. work provides new perspective study characteristics.