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Three-dimensional periodic disturbances acting upon airfoils in cascade (1981)

Atassi, H.

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Publication Date: 2019-06-28

Description: A theory for three dimensional periodic gusts interacting with loaded airfoils was developed. The unsteady disturbances are linearized with respect to the mean potential flow of the airfoils. The vorticity transport equation is integrated analytically in a Lagrangian form. The vorticity vector shows strong variations in its magnitude and wavelength as it interacts with the flow field of a lifting airfoil. The streamwise component of vorticity increases significantly with flow acceleration and flow turning. The rectangular fan approximation is used and a single Helmholtz equation is derived that characterizes the unsteady three dimensional flow field.

Keywords: AIRCRAFT PROPULSION AND POWER

Type: Ecole Polytechnique de Lausanne Aeroelasticity of Turbomachines; p 383-398

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