SURFACE GRID GENERATION METHODS FOR OVERSET GRIDS

Efficient methods for performing surface grid generation for overset ( overlapping) grids are presented, These include a scheme using hyperbo lic partial differential equations and an algebraic marching scheme. T he combined use of hyperbolic and algebraic methods in easing the task of surface domain decomposition and surface grid generation for the C himera overset grid approach is discussed. Extensions of a basic hyper bolic scheme are made to march over a collection of panel networks whe re each network consists of a rectangular array of panels (quadrilater al cells). Other enhancements include a more robust projection scheme and methods to improve grid boundary control. Examples are given for g eneral applications in overset grid methods such as collar grids for i ntersecting geometric components and cap grids at fuselage noses and w ing tips. More complex examples include surface grids For the Space Sh uttle Orbiter and the V-22 tiltrotor.