Impulsive start of a symmetric airfoil at high angle of attack
نویسندگان
چکیده
منابع مشابه
Effect of Amplitude and Mean Angle of Attack on the Unsteady Surface Pressure of a Pitching Airfoil
Details of pressure distributions, on a two dimensional airfoil oscillating in pitch through stall, in a 0.8 0.8 m low-speed wind tunnel are presented. Pitching occurred about the airfoils quarter-chord axis. Pitch rate, Reynolds number, and oscillation amplitudes were varied to determine the effects on pressure and lift distributions. It was found that mean angle of attack and pitching amplitu...
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Large-eddy simulations (LES) of flow over a low-speed airfoil at high angle of attack (15◦) are performed using two different flow solvers, Fluent and CDP, on the same fine structured mesh, whose density was previously shown to provide a reasonably accurate trailing-edge flow for noise predictions at a lower incidence of 8◦. These simulations are compared with detailed pressure measurements mad...
متن کاملAnalysis of wings using Airfoil NACA 4412 at different angle of attack
The purpose of this paper is to analysis the basic aerodynamic theory of wings and the provide an introduction to wind tunnel testing. This is followed by the result from the wind tunnel testing of a NACA4412 and the analysis of the data. Lift increase at the angle of attack increase at certain point and at this point it become maximum. After that if the angle of attack is increased by further,...
متن کاملHigh Angle of Attack Aerodynamics
High angle of attack aerodynamics is inherently associated with: • separated flows, and thus nonlinear aerodynamics > one of the key aspects is the interaction of components, and in particular, vortex flows (vortex bursting is also an important effect) • heavily dependent on wind tunnel testing • connected with flight simulation to ensure good handling qualities > this means that large amounts ...
متن کاملEffect of Amplitude and Mean Angle of Attack on Wake of an Oscillating Airfoil
The unsteady wake of an EPPLER 361 airfoil in pitching motion has been investigated in a subsonic wind tunnel by hot-wire anemometry. The airfoil was given the pitching motion about the one-quarter chord axis at reduced frequency of 0182. Streamwise mean velocity profiles (wake profiles) were investigated at several vertically aligned points behind the airfoil at one-quarter chord downstream di...
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ژورنال
عنوان ژورنال: AIAA Journal
سال: 1996
ISSN: 0001-1452,1533-385X
DOI: 10.2514/3.13054