GRID GENERATION AND FLOW ANALYSES FOR WING/BODY/WINGLET CONFIGURATIONS

A grid generation code together with both full potential and Euler flow analysis codes has been developed for the study of wing/body/winglet configurations. The grid generation code solves a set of elliptic equations to generate the field grids. Both the full potential and the Euler flow codes solve the basic conservation equations of fluid mechanics using a finite volume formulation. A highly efficient multigrid scheme is employed in both the full potential code and the Euler code to insure fast and reliable convergence of the iterative solution procedure. The advantages and the disadvantages of using the full potential code versus the Euler code for wing/winglet analyses are discussed. Test/theory comparisons show that the Euler code gives better results, even at subcritical flow conditions.