Aerodynamic optimization of supersonic transport wing using unstructured adjoint method

An aerodynamic design method has been developed by using a three-dimensiona l Euler code and an adjoint code with a discrete approach. The method is ap plied to wing design problems of supersonic transports with wing-body-nacel le and wing-body configurations. Hicks-Henne shape functions are adopted fo r the surface geometry perturbation, and the elliptic equation method is em ployed for the interior grid modification during the design process. Interi or grid sensitivities are neglected except those for design parameters asso ciated with a body translation such as nacelles. The sequential quadratic p rogramming method is used to minimize the drag with constraints on the lift and airfoil thickness. Successful design results confirm validity and effi ciency of the present design method.