Journal ArticleDOI
Dynamical Behavior of Unsteady Flowfield of an Elastically Mounted Flapping Airfoil
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This article is published in AIAA Journal.The article was published on 2018-01-24. It has received 6 citations till now. The article focuses on the topics: Flapping & Airfoil.read more
Citations
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Journal ArticleDOI
Transition to chaos in the flow-induced vibration of a pitching–plunging airfoil at low Reynolds numbers: Ruelle–Takens–Newhouse scenario
TL;DR: In this article, the transition from periodic to chaotic dynamics in the fluid-elastic response of a 2-d flexible pitch-plunge flapping airfoil with chord-wise rigidity is analyzed.
Journal ArticleDOI
An alternative simulation approach for the ONERA aerodynamic model and its application in the nonlinear aeroelastic analysis of slender wings with pylon-store system
TL;DR: In this paper, an alternative simulation approach is proposed to simplify the calculations for the ONERA model, in which the circulatory part of the OnERA model is solved analytically by using Duhamel integral method, and the corresponding aerodynamic loads can be directly expressed in the modal space of the wing motion through only introducing two additional variables.
Journal ArticleDOI
Numerical investigation of the wake transition and aerodynamic efficiency of the two-dimensional propulsive wing
TL;DR: In this paper , the authors explored the optimal working range and wake characteristics of the propulsive wing, the wake transition and aerodynamic efficiency of the Propulsive Wing in cruise, and showed that the wake structure will change greatly at high angles of attack and lead to changes in the aerodynamic performance.
Book ChapterDOI
Transitional Flow Dynamics Past a Passively Flapping Airfoil in Gusty Flow
TL;DR: In this paper, the fluid-structure interaction (FSI) framework is composed of an incompressible Navier-Stokes solver weakly coupled with a two degree-of-freedom (dof) nonlinear structural model.
Journal ArticleDOI
A complex networks based approach to nonlinear aeroelasticity
M.S. Aswathy,Sunetra Sarkar +1 more
TL;DR: In this paper , the effect of low intensity additive noise on a subcritical pitch-plunge aeroelastic system through the lens of complex networks was investigated, and the results have shown that a careful consideration of the stochastic perturbations is needed in the design and operations of such systems, and that complex networks based methods are successful in providing novel perspectives on the topology of the phase-space.
References
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Journal ArticleDOI
Limit-cycle oscillations in unsteady flows dominated by intermittent leading-edge vortex shedding
TL;DR: In this article, high-frequency limit-cycle oscillations of an airfoil at low Reynolds number were studied numerically, where the aerodynamic model used in the aeroelastic framework is a potential-flow-based discrete-vortex method, augmented with intermittent leading-edge vortex shedding based on a leading edge suction parameter reaching a critical value.
Journal ArticleDOI
Vortex interactions with flapping wings and fins can be unpredictable
TL;DR: It is suggested that swimming and flying animals could control the predictability of vortex-wake interactions, and the corresponding propulsive forces with their fins and wings.
Journal ArticleDOI
Chaotic Flow Generated by an Oscillating Foil
Journal ArticleDOI
Identifying the route to chaos in the flow past a flapping airfoil
TL;DR: In this paper, a bifurcation analysis with the plunge amplitude as the control parameter reveals that, for high plunge amplitudes, periodic vortex patterns in the wake are interrupted by abrupt chaotic patterns.
Dissertation
Analysis of downwind sail structures using non-linear shell finite elements: wrinkle development and fluid interaction effects
TL;DR: In this article, an analysis of the turbulent flow acting on downwind yachts is performed with a Reynolds Averaged Navier Stokes method implemented in the finite volume solver OpenFOAM, and case studies regarding the detailed description of the flow/wrinkle interactions, as well as the flow generation on full 3D sail-type devices.