Yang, L. and Su, Y. M. and Xiao, Q. (2011) Numerical study of propulsion mechanism for oscillating rigid and flexible tuna-tails. Journal of Bionic Engineering, 8 (4). pp. 406-417. ISSN 1672-6529Full text not available in this repository. (Request a copy from the Strathclyde author)
Numerical study on the unsteady hydrodynamic characteristics of oscillating rigid and flexible tuna-tails in viscous flow-field is performed. Investigations are conducted using Reynolds-Averaged Navier-Stokes (RANS) equations with a moving adaptive mesh. The effect of swimming speed, flapping amplitude, frequency and flexure amplitude on the propulsion performance of the rigid and flexible tuna-tails are investigated. Computational results reveal that a pair of leading edge vortices develop along the tail surface as it undergoes an oscillating motion. The propulsive efficiency has a strong correlation with various locomotive parameters. Peak propulsive efficiency can be obtained by adjusting these parameters. Particularly, when input power coefficient is less than 2.8, the rigid tail generates larger thrust force and higher propulsive efficiency than flexible tail. However, when input power coefficient is larger than 2.8, flexible tail is superior to rigid tail.
|Keywords:||hydromechanics, swimming propulsion, tuna-tail, fin, performance, RANS, hydrodynamic characteristics, propulsion mechanism, viscous flow-fields, numerical study , oscillating, rigid, flexible, Naval architecture. Shipbuilding. Marine engineering, Bioengineering, Biotechnology, Biophysics|
|Subjects:||Naval Science > Naval architecture. Shipbuilding. Marine engineering|
|Department:||Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||26 Oct 2012 13:59|
|Last modified:||20 May 2016 04:13|