An Analysis of Transonic Jet-Flapped Airfoils with the Inclusion of Viscous Effects.

Abstract : The inviscid and viscous effects associated with a jet-flapped airfoil in the transonic regime are investigated. Integral methods are used for the description of the viscous portions of the flow and a relaxation method is used for the inviscid portions. The viscous-inviscid coupling is delineated. Their coupling procedures along the wing and the jet acknowledge the importance and magnitude of the viscous effects on pressure distribution and directly incorporate the displacement effect on the wing and the effects of jet mixing into the boundary conditions for the computation of the entire flow. Preliminary numerical results are presented to validate the solution. A computer program for a systematic exploitation of the complete analysis is discussed.