ANALYSIS OF WINGS WITH MULTI-SEGMENTED FLAPS USING A NONPLANAR VORTEX LATTICE METHOD

An important problem of analysis of complex wing platforms with multi-segmented flaps has been addressed in this paper. Non-planar vortices are used to simulate the wing incidence and camber effects whereas thickness effects are incorporated using constant source flat panels. Important aspects of the current work are modelling of flow near wing-flap junctures, use of symmetrical singularity for calculating the strengths of the thickness sources, efficient programming, which is a pre-requisite while using non-planar vortices and a versatile geometric package which generates automatically optimum lattice layout for rapid numerical convergence. The method has been validated against a number of test cases for which results are available from experiments and other theories.