Effects of Dynamic Stall on Propulsive Efficiency and Thrust of Flapping Airfoil

Isogai, Koji; Shinmoto, Yasuhisa; Watanabe, Yukio

doi:10.2514/2.589

Cited by 158 publications

(63 citation statements)

References 9 publications

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“…7) is also very similar to that of Ref. 4), although the compressible equations are solved at the low Mach number 0.3. This is effectively incompressible flow.…”

Section: Validation For Stationary and Oscillating Airfoilsupporting

confidence: 58%

“…Along with these theoretical and experimental studies, the recent CFD development has enabled numerical simulation of the flow around oscillating airfoils. For example, Ramamurti et al 3) calculated the incompressible flow, and Isogai et al 4) solved the compressible flow. In some studies, structural models are introduced coupled with CFD codes to calculate aeroelastic phenomena numerically.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation for Feedback Control of Airfoil Oscillation in Incompressible Flow

Maeda

Morishita

2006

Trans. Japan Soc. Aero. S Sci.

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Numerical simulations of the flow around a periodically vibrating airfoil and the two-degree-of-freedom (TDOF) bending-torsion flutter characteristics were carried out. An unsteady, two-dimensional, incompressible Navier-Stokes flow solver was coupled with a two-degree-of-freedom structural model for a flutter computation. To simulate unsteady phenomena, the Navier-Stokes equations are described by the ALE method. The Baldwin-Lomax turbulence model was implemented for high Reynolds number calculations. Computations of the periodically vibrating airfoil show agreement with Theodorsen's linearized theory and the existing results of some numerical analyses. Flutter was observed in the TDOF model coupled with the flow solver when the rigidity of the airfoil was small. A control method for the flow field was studied and the airfoil flutter was stabilized by a PID (Proportional-Integral-Derivative) control algorithm.

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“…7) is also very similar to that of Ref. 4), although the compressible equations are solved at the low Mach number 0.3. This is effectively incompressible flow.…”

Section: Validation For Stationary and Oscillating Airfoilsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation for Feedback Control of Airfoil Oscillation in Incompressible Flow

Maeda

Morishita

2006

Trans. Japan Soc. Aero. S Sci.

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“…1, 2 and 3 taken together show that the propulsive efficiency of an oscillating airfoil is sensitively dependent on the phase angle between pitching and plunging motion. This is in agreement with the findings reported by Isogai et al [6] for Re = 10 5 and Tuncer and Kaya [7], suggesting that high efficiencies and thrusts may be simultaneously achieved by optimizing interaction of the leading edge vortex with the foil motion.…”

Section: Optimization Of Thrust and Efficiencysupporting

confidence: 83%

“…Laminar and turbulent flows are considered. The table shows that the optimum phase angle between pitch and plunge motion is somewhere between φ = 75 • to 85 • , again in good agreement with Anderson et al [4] and Isogai et al [6].…”

Section: Optimization Of Thrust and Efficiencysupporting

confidence: 79%

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Thrust and Efficiency of Propulsion by Oscillating Foils

Young

Lai

Kaya

et al.

Computational Fluid Dynamics 2004

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Numerical simulation of incompressible viscous flow past a heaving airfoil

Sarkar

Venkatraman

2005

Numerical Methods in Fluids

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SUMMARYNumerical simulations of a heaving airfoil undergoing non-sinusoidal motions in an incompressible viscous ow is presented. In particular, asymmetric sinusoidal motions, constant heave rate oscillations, and sinusoidal motions with a quiescent gap, are considered. The wake patterns, thrust force coe cients, and propulsive e ciency at various values of non-dimensional heave velocity are computed. These have been compared with those of corresponding sinusoidal heaving motions of the airfoil. It is shown that for a given non-dimensional heave velocity and reduced frequency of oscillation, asymmetric sinusoidal motions give better thrust and propulsive e ciencies in comparison to pure harmonic motion. On the other hand, constant rate heave motion do not compare favourably with harmonic motion. A train of sinusoidal pulses separated by a quiescent gap compares favourably with a pure sinusoidal motion, but with the notable exception that the quiescent gap induces a discontinuity that induces large impulses to the wake pattern.

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Effects of Dynamic Stall on Propulsive Efficiency and Thrust of Flapping Airfoil

Cited by 158 publications

References 9 publications

Numerical Simulation for Feedback Control of Airfoil Oscillation in Incompressible Flow

Numerical Simulation for Feedback Control of Airfoil Oscillation in Incompressible Flow

Thrust and Efficiency of Propulsion by Oscillating Foils

Numerical simulation of incompressible viscous flow past a heaving airfoil

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