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Showing 1 to 7 of 7 for “"Theodorsen"”.
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Unsteady Aerodynamics of Deformable Thin Airfoils
… to extend the unsteady aerodynamic theory of Theodorsen and Garrick (which is restricted to rigid airfoil motion) to deformable thin airfoils. Frequency-domain lift, pitching moment and thrust expressions are derived for an airfoil undergoing harmonic oscillations and deformation in the form …
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Unsteady aerodynamics for aeroelastic applications using the impulse response method
… unsteady aerodynamics has been grounded on the Theodorsen function, which identifies the response of a 2-D wing section to harmonic pitch and plunge oscillations. Recently, however, the Aerodynamic Impulse Response has emerged, identifying a more fundamental aerodynamic response of a …
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Aeroservoelastisches Modell zur Beschreibung der instationären Aerodynamik für nichtlineare beliebige Eingangsgrößen im Zeitbereich
… function is validated by comparison with the THEODORSEN function in LAPLACE domain. Compared to other approximations this procedure yields better imaginary parts of the indicial lift. This results in a better prediction of the flutter speed.2. The two other formulas are related to the time …
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Modeling of Nonlinear Unsteady Aerodynamics, Dynamics and Fluid Structure Interactions
… this objective, the classical unsteady theory of Theodorsen is revisited by relaxing some of the major assumptions such as (1) flat wake, (2) small angle of attack, (3) small disturbances to the mean flow components, and (4) time-invariant free-stream. The kinematics of the wake vortices is …
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Three-Dimensional Unsteady Hydrodynamics of Tidal Turbines
… by linear analytic theory (such as the Theodorsen or Sears functions). At low reduced frequencies and low aspect ratios, 3D effects are strongly visible. In the vicinity of the aerofoil tips, 3D effects are significant at any reduced frequency. An exception is found in swept wings, where …
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The effect of turboprop propulsion on the aerodynamic benefits of formation flight
… of the propeller theory of Goldstein and Theodorsen. The downwash velocity field of a B747 during cruise, obtained via the use of the VFM Burnham-Hallock (VFM B-H) model programme, was verified against both the simulation conducted by Ehret and Oertel, in which an integrated Biot-Savart …
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Active control of trailing vortices by means of long- and short-wavelength actuation
… Platte in Potentialströmung betrachten, haben Theodorsen, Greenberg, Isaacs und van der Wall instationäre Randbedingungen wie z. B. Nick- und Vertikalbewegung als auch eine oszillierende Anströmung mit berücksichtigt. Auch wenn diese Theorien teilweise mehr als 70 Jahre alt sind, so existieren …