Computational analysis of flapping airfoil aerodynamics

Tuncer, İsmail Hakkı
Ekaterinaris, John A.
A Navier-Stokes, a potential flow and an interactive Navier-Stokes/potential flow analysis are described for the determination of the flowfield and of the aerodynamic forces generated by a flapping airfoil in low subsonic flow. The numerical solutions predict thrust for a sinusoidally flapping motion with a mean amplitude of 0.10 c and a reduced frequency of k = 1.5. The thrust producing vortical wake profiles are identified. The interactive Navier-Stokes/potential flow solution method yields as accurate a flowfield prediction as the full domain Navier-Stokes solution.


Computational study of flapping airfoil aerodynamics
Tuncer, İsmail Hakkı (American Institute of Aeronautics and Astronautics (AIAA), 2000-05-01)
Unsteady, viscous, low-speed flows over a NACA 0012 airfoil oscillated in plunge and/or pitch at various reduced frequency, amplitude, and phase shift are computed. Vortical wake formations, boundary-layer flows at the leading edge, the formation of leading-edge vortices and their downstream convection are presented in terms of unsteady particle traces. Flow separation characteristics and thrust-producing wake profiles are identified. Computed results compare well with water tunnel flow visualization and fo...
Numerical investigations of lateral jets for missile aerodynamics
Ağsarlıoğlu, Ekin; Albayrak, Kahraman; Department of Mechanical Engineering (2011)
In this thesis, effects of sonic lateral jets on aerodynamics of missiles and missilelike geometries are investigated numerically by commercial Computational Fluid Dynamics (CFD) software FLUENT. The study consists of two parts. In the first part, two generic missile-like geometries with lateral jets, of which experimental data are available in literature, are analyzed by the software for validation studies. As the result of this study, experimental data and CFD results are in good agreement with each other...
Active Control of Smart Fin Model for Aircraft Buffeting Load Alleviation Applications
Chen, Yong; Ulker, Fatma Demet; Nalbantoglu, Volkan; Wickramasinghe, Viresh; Zimcik, David; Yaman, Yavuz (2009-11-01)
Following the program to lest a hybrid actuation system for high-agility aircraft buffeting load alleviation oil the full-scale F/A-18 vertical fin structure, an investigation has been performed to understand the aerodynamic effects of high-speed vortical flows on the dynamic characteristics of vertical fin structures. Extensive wind-tunnel tests have been conducted on a scaled model fill integrated with piezoelectric actuators and accelerometers to measure file aft-tip vibration responses under various fre...
Computational modelling of free surface flow in intake structures using flow 3D software
Aybar, Akın; Aydın, İsmail; Department of Civil Engineering (2012)
Intakes are inlet structures where fluid is accelerated to a certain flow velocity to provide required amount of water into a hydraulic system. Intake size and geometry affects the formation of flow patterns, which can be influential for hydraulic performance of the whole system. An experimental study is conducted by measuring velocity field in the hydraulic model of the head pond of a hydropower plant to investigate vortex formation. Vortex strength based on potential flow theory is calculated from the mea...
Numerical investigation on the effect of transversal fluid field deformation on heat transfer in a rod bundle with mixing vanes
Tas-Koehler, Sibel; Lecrivain, Gregory; Krepper, Eckhard; Unger, Sebastian; Hampel, Uwe (Elsevier BV, 2020-05-01)
Spacer grids of fuel rod assemblies are equipped with vanes, which promote flow mixing and turbulence within and across the sub-channels, thereby enhancing the heat transfer. First, a literature study about the various effect of the spacer grid has on the sub-channel thermo-hydrodynamics is provided. It follows, that the multiple effects on the vane angle are insufficiently understood. The effect of the vane angle on design parameters, namely the evolution of the Nusselt number, the pressure drop, the cross...
Citation Formats
İ. H. Tuncer and J. A. Ekaterinaris, “Computational analysis of flapping airfoil aerodynamics,” 1994, vol. 196, Accessed: 00, 2021. [Online]. Available: