We compute the wake of a two-dimensional and three-dimensional flexible fin in an unsteady flow field with heaving and pitching motions using FLUENT. Deflexion mode is used for a non-uniform cantilever beam with non-uniformly distributed load. The effect of chordwise deflexion length on the characteristics of propulsion is discussed for two-dimensional flexible fin. The thrust coefficient decreases, propulsive efficiency increases and the intensity of turbulence attenuates gradually as the deflexion length increases. For a three-dimensional flexible fin, the intensity of the vortex in the plane of symmetry is higher than that in the plane at 3/4 span length of the caudal fin. But the propulsive performance achieved is not what we expected with the given deflexion mode. © 2008 Jilin University.
CITATION STYLE
Wang, Z. dong, Chen, P., & Zhang, X. qing. (2008). Wake Vortex Structure Characteristics of a Flexible Oscillating Fin. Journal of Bionic Engineering, 5(1), 49–54. https://doi.org/10.1016/S1672-6529(08)60006-2
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