Performance of flapping foil propulsion

Schouveiler, Lionel; Hover, Franz S.; Triantafyllou, Michael S.

doi:10.1016/j.jfluidstructs.2005.05.009

Cited by 207 publications

(125 citation statements)

References 23 publications

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“…Obviously, the two scenarios can be considered as the cases with opposite phase lags between the pitching and plunging motions. It should be noted that, as reported in Jones and Platzer (1997) and Schouveiler et al (2005), a better propulsive performance can be achieved when a suitable phase lag was adopted for an airfoil in combined pitching and plunging motion. It is well known that the generation of wake vortices near the airfoil trailing edge is due to the pressure differences between the upper and lower sides of the pitching airfoil.…”

Section: Discussionmentioning

confidence: 73%

An experimental study of the effects of pitch-pivot-point location on the propulsion performance of a pitching airfoil

Tian

Bodling

Liu

et al. 2016

Journal of Fluids and Structures

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a b s t r a c tAn experimental investigation was conducted to characterize the evolution of the unsteady vortex structures in the wake of a pitching airfoil with the pitch-pivot-point moving from 0.16C to 0.52C (C is the chord length of the airfoil). The experimental study was conducted in a low-speed wind tunnel with a symmetric NACA0012 airfoil model in pitching motion under different pitching kinematics (i.e., reduced frequency k ¼3.8-13.2). A high-resolution particle image velocimetry (PIV) system was used to conduct detailed flow field measurements to quantify the characteristics of the wake flow and the resultant propulsion performance of the pitching airfoil. Besides conducting "free-run" PIV measurements to determine the ensemble-averaged velocity distributions in the wake flow, "phase-locked" PIV measurements were also performed to elucidate further details about the behavior of the unsteady vortex structures. Both the vorticity-moment theorem and the integral momentum theorem were used to evaluate the effects

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Section: Discussionmentioning

confidence: 73%

An experimental study of the effects of pitch-pivot-point location on the propulsion performance of a pitching airfoil

Tian

Bodling

Liu

et al. 2016

Journal of Fluids and Structures

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show abstract

“…3(a) through (d), the history of the plate's incidence angle, θ(t/T), can be segregated in each semi-stroke into two parts: a long run of nearly constant θ(t/T), termed "translational", where the plate is resting against its incidence-limiter; and a fairly abrupt period of rotation, where θ(t/T) varies from one extreme to the opposite extreme in passing to the succeeding semi-stroke. The plate's incidence-history resembles the effective angle of attack history in thunniform swimming, identified by Schouveilier et al (2005).…”

Section: Frequencymentioning

confidence: 99%

Quasi-steady response of free-to-pivot flat plates in hover

Granlund

Bernal

2013

Journal of Fluids and Structures

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“…Quantitative comparisons between the hydrodynamics of fish and small underwater vehicles have been formulated [7]. Extensive testing of oscillating foils has been performed in the Massachusetts Institute of Technology (MIT) Ship Model Testing Tank, resulting in a solid understanding of the fundamental parameters of thrust production in foils [8][9][10], and design and projected performance of the flapping-foil AUV [11,12] has also been studied.…”

Section: Introductionmentioning

confidence: 99%