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A method for predicting unsteady potential flow about an aerofoil
Author(s) -
Vezza M.,
Galbraith R. A. McD.
Publication year - 1985
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650050405
Subject(s) - inviscid flow , airfoil , vorticity , flow (mathematics) , mathematics , two dimensional flow , potential flow , quadratic equation , computational fluid dynamics , incompressible flow , unsteady flow , current (fluid) , strouhal number , mechanics , vortex , geometry , physics , turbulence , reynolds number , thermodynamics
A new model is presented for the calculation of the incompressible, inviscid flow around an arbitrary aerofoil undergoing unsteady motion. The technique was developed from the steady flow algorithm of Leishman and Galbraith 1 in which use was made of a linear distribution of panel vorticity. The procedure is in the same class as that of Basu and Hancock 2 but, because of the particular approach to the manner of specifying the shed vorticity, only a set of linear simultaneous equations needs be solved, unlike the method of Reference 2, complicated by the necessary solution of a quadratic. A brief history of unsteady flow modelling is given in the introduction, followed by the mathematical details of the current method. Results are presented and discussed for a number of cases which clearly illustrate relevant characteristics of unsteady flow.