AN AUTOMATIC GRID GENERATION PROCEDURE FOR COMPLEX AIRCRAFT CONFIGURATIONS

An automatic grid generation procedure based on a hybrid elliptic-para bolic method for complex aircraft configurations is presented. The gri d system consists of inner and outer grids. The inner grid near the bo dy surface is generated by a parabolic equation with a second-order di ssipation term. On the other hand, the enter grid with an arbitrarily specified outer boundary is generated by an elliptic method based on t he electro-static theory. This hybrid method is shown to be applicable to any types of surface grids including unstructured (triangular) one s. The Navier-Stokes simulation for an aircraft configuration was carr ied out using the block structured grid generated by the present. hybr id method.