Unsteady inviscid transonic airfoil-vortex interaction is numerically analyzed by solving the two-dimensional unsteady Euler equation in integral form using a finite volume scheme. The solution procedure is based on an explicit Runge-Kutta time-stepping scheme wherein the spatial terms are central-differenced and a combination of second- and fourth-differences in the flow variables is used to form the numerical dissipation terms to stabilize the scheme. A velocity decomposition technique is applied to alleviate the problem of vortex diffusion by the numerical dissipation terms and to treat the interaction of a Rankine vortex with an airfoil accurately. Results obtained are compared with available numerical data.
A finite volume Euler calculation of the aerodynamics of transonic airfoil-vortex interaction
Berechnung der aerodynamischen Wechselwirkungen zwischen Ueberschalltragfluegeln und Wirbelstroemung mit Hilfe der Finite-Volumen-Methode nach Euler
AIAA-Papers ; Jul ; 1-11
1987
11 Seiten, 7 Bilder, 19 Quellen
Conference paper
English