THE CREATION OF LIFT BY SHARP-EDGED DELTA-WINGS - AN ANALYSIS OF A SELF-ADAPTIVE NUMERICAL-SIMULATION USING THE CONCEPT OF VORTICITY CONTENT

This article describes the self-adaptive method AMRFLEX3D which is use d to compute steady, compressible inviscid and viscous flows. The adap tive capabilities are realized on the basis of structured blocks. This feature can be introduced into any structured multi-block CFD-code. A delta wing geometry at transonic flow conditions serves as test case for both Euler and Navier-Stokes simulations. After a description of t he resulting grid-structure, investigations of the generation of circu lation along the leading edge are presented. Using the self-adaptive g rid system, a correlation between the strength of vortex layers and th e circulation is found. A closer look at the circulation in the flow f ield reveals remarkable differences between Euler and Navier-Stokes si mulations. (C) Elsevier, Paris.