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Computation of viscous flows over airfoils, including separation, with a coupling approach

Author
Leballeur, J. C.
Published
Jun 1, 1983.
Physical Description
1 electronic document
Online Version

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Summary
Viscous incompressible flows over single or multiple airfoils, with or without separation, were computed using an inviscid flow calculation, with modified boundary conditions, and by a method providing calculation and coupling for boundary layers and wakes, within conditions of strong viscous interaction. The inviscid flow is calculated with a method of singularities, the numerics of which were improved by using both source and vortex distributions over profiles, associated with regularity conditions for the fictitious flows inside of the airfoils. The viscous calculation estimates the difference between viscous flow and inviscid interacting flow, with a direct or inverse integral method, laminar or turbulent, with or without reverse flow. The numerical method for coupling determines iteratively the boundary conditions for the inviscid flow. For attached viscous layers regions, an underrelaxation is locally calculated to insure stability. For separated or separating regions, a special semi-inverse algorithm is used. Comparisons with experiments are presented.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19840015539.
Accession ID: 84N23607.
NAS 1.15:77079.
NASA-TM-77079.
Computation of Viscous-Inviscid Interaction Symp.; 29 Sep. - 1 Oct. 1980; Colorado Springs, CO; United States.
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No Copyright.
View MARC record | catkey: 15708083