A novel implementation of computational aerodynamic shape optimisation using Modified Cuckoo Search

This paper outlines a new computational aerodynamic design optimisation algorithm using a novel method of parameterising a computational mesh using 'control nodes'. The shape boundary movement as well as the mesh movement is coupled to the movement of user-defined control nodes via a Delaunay Graph Mapping technique. A Modified Cuckoo Search algorithm is employed for optimisation within the prescribed design space defined by the allowed range of control node displacement. A finite volume compressible Navier-Stokes solver is used for aerodynamic modelling to predict aerodynamic design 'fitness'. The resulting coupled algorithm is applied to a range of test cases in two dimensions including aerofoil lift-drag ratio optimisation intake duct optimisation under subsonic, transonic and supersonic flow conditions. The discrete (mesh-based) optimisation approach presented is demonstrated to be effective in terms of its generalised applicability and intuitiveness.