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Two commonly used methods for predicting unsteady airloads are: 1) the panel method based on the surface distribution of singularity elements and 2) the indicial method for unsteady problems governed by the linearized partial differential equation and linearized boundary conditions. The panel method considered here involves a piecewise linear continuous distribution of singularities (sources and doublets) over the airfoil surface. Since the linearity assumptions of the indicial method do not allow for variations in the form of the chordwise pressure, this approach seems to be more economical from the computational point of view. The present study is aimed at the systematic assessment of the two approaches by considering a number of unsteady two-dimensional flows. Good agreement was found with measured airloads data for the two methods.
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Tom
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593--611
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Bibliogr. 9 poz., wykr.
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autor
- "CAIUS IACOB" Institute of Applied Mathematics P.O. Box 1-24, Ro-70700, Bucharest, ROMANIA, vcardos@ns.IMA.Ro
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Bibliografia
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bwmeta1.element.baztech-article-BPZ2-0010-0040