NUMERICAL-SIMULATION OF VISCOUS TRANSONIC-FLOWS OVER AN AIRFOIL

High Reynolds number viscous transonic flow is described based on an i nteraction of the potential outer flow with the boundary layer and wak e. Following the procedure of Lighthill (1958), the solutions in these domains are matched to each other through boundary conditions. The so lution to the complete problem is obtained iteratively through success ive computations of the flows in the outer and inner domains. Both old and new algorithms are used for the iteration process and subsequent problem solution. Results are given for all the airfoils from the Expe rimental Data Base for Computer Program Assessment (AGARD-AR-138, 1979 ). A comparison of these results with experimental data shows the degr ee of agreement between these unbounded airfoil flow simulations and r eal transonic flow over the central part of a straight wing.