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Dynamical mode decomposition of Gurney flap wake flow
Theoretical and Applied Mechanics Letters, 2011 AbstractThe present work uses dynamic mode decomposition (DMD) to analyze wake flow of NACA0015 airfoil with Gurney flap. The physics of DMD is first introduced. Then the PIV-measured wake flow velocity field is decomposed into dynamical modes. The vortex shedding pattern behind the trailing edge and its high-order harmonics have been captured with ...
Pan, Chong, Yu, Dongsheng, Wang, Jinjun
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FluidsIn aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
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Influence of self-adaptive hairy flaps on the stall delay of an airfoil in ramp-up motion [PDF]
, 2014 It is known in the case of some birds that the coverts on the upper side of their wings pop-up under critical flight conditions such as the landing approach, thus acting like a brake on the spread of flow separation. Taking experimental investigations as
Brücker, C., Weidner, C.
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Multi-Objective Optimization Design of Dynamic Performance of Hydrofoil with Gurney Flap
Journal of Marine Science and EngineeringThe horizontal axis tidal turbine, as a crucial device for capturing tidal energy, has gained significant attention because it has better energy efficiency performance.
Xiangyun Zhang +3 more
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Segmented Gurney Flaps for Improved Wind Turbine Wake Recovery
Wind EnergyWhen wind passes through the rotor of a wind turbine, the velocity is decreased while turbulence is increased. The region of decreased wind speed behind the rotor is known as the wind turbine wake and is bounded by a complex structure of helical vortices.
Nirav Dangi +4 more
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Keys to families of Cladocera and to subfamilies, genera, species and subspecies of Macrothricidae and Moinidae [Translation from: Leningrad, Fauna SSSR, Crustacea 1 (3), 1971] [PDF]
, 1977 Identification keys to families of Cladocera and to subfamilies, genera, species and subspecies of Macrothricidae and Moinidae are given.
Smirnov, N.N.
core
Water tunnel studies of dynamic wing flap effects [PDF]
, 2016 The flow features developing over a two-element NACA 0012 airfoil, with the rear portion serving as a trailing edge flap, were investigated using dye flow visualization in the NPS water tunnel.
Gonz‡lez, Edgar E.
core
Applied SciencesThe combined control method of dimples and Gurney flaps has proven effective in enhancing the power coefficient of Vertical Axis Wind Turbines (VAWTs). However, the adaptability of this combined control structure to different airfoil geometries remains ...
Tao Jiang +5 more
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Active Management of Flap-Edge Trailing Vortices [PDF]
, 2008 The vortex hazard produced by large airliners and increasingly larger airliners entering service, combined with projected rapid increases in the demand for air transportation, is expected to act as a major impediment to increased air traffic capacity ...
Greenblatt, David +4 more
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Dynamics of a hybrid morphing wing with active open loop vibrating trailing edge by Time-Resolved PIV and force measures [PDF]
, 2017 A quantitative characterization of the effects obtained by high frequency-low amplitude trailing edge actuation is presented. Particle image velocimetry, pressure and aerodynamic forces measurements are carried out on a wing prototype equipped with shape
Braza, Marianna +6 more
core +3 more sources