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Asymptotic theory of short separation regions on the leading edge of a slender airfoil

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Abstract

The two-dimensional flow of a viscous incompressible fluid near the leading edge of a slender airfoil is considered. An asymptotic theory of this flow is constructed on the basis of an analysis of the Navier—Stokes equations at large Reynolds numbers by means of matched asymptotic expansions. A central feature of the theory is the region of interaction of the boundary layer and the exterior inviscid flow; such a region appears on the surface of the airfoil in a definite range of angles of attack. The boundary-value problem for this region is reduced to an integrodifferential equation for the distribution of the friction. This equation has been solved numerically. As a result, closed separation regions are constructed, and the angle of attack at which separation occurs is found.

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Authors and Affiliations

  1. Moscow

    A. I. Ruban

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  1. A. I. Ruban
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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 1, pp. 42–51, January–February, 1981.

I thank V. V. Sychev and Vik. V, Sychev for assistance.

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Ruban, A.I. Asymptotic theory of short separation regions on the leading edge of a slender airfoil. Fluid Dyn 17, 33–41 (1982). https://doi.org/10.1007/BF01090696

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  • DOI: https://doi.org/10.1007/BF01090696

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