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A users guide for A344: A program using a finite difference method to analyze transonic flow over oscillating airfoils (1979)

Weatherill, W. H. ; Ehlers, F. E.

In: CASI

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Publication Date: 2019-06-27

Description: The design and usage of a pilot program for calculating the pressure distributions over harmonically oscillating airfoils in transonic flow are described. The procedure used is based on separating the velocity potential into steady and unsteady parts and linearizing the resulting unsteady differential equations for small disturbances. The steady velocity potential which must be obtained from some other program, was required for input. The unsteady equation, as solved, is linear with spatially varying coefficients. Since sinusoidal motion was assumed, time was not a variable. The numerical solution was obtained through a finite difference formulation and either a line relaxation or an out of core direct solution method.

Keywords: AERODYNAMICS

Type: NASA-CR-159141 , D6-48837

Format: application/pdf

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