SOLUTION ADAPTIVE GRIDDING WITHIN THE CHIMERA GRID SCHEME

THIS PROJECT IS CONCERNED WITH THE DEVELOPMENT OF A COMPUTATIONAL TOOL THAT COMBINES SOLUTION-ADAPTIVE TECHNIQUES WITH AN OVERSET GRID TECHNIQUE TO SOLVE UNSTEADY AERODYNAMIC PROBLEMS IN SUCH AREAS AS POWERED LIFT, HELICOPTER-WAKE RESOLUTION, AND HIGH-ALPHA, ENHANCED MANEUVERABILITY AIRCRAFT. BOTH TECHNIQUES HAVE BEEN USED TO ATTEMPT TO SIMPLIFY THE TASK OF GENERATING EFFICIENT MESHES FOR COMPUTATIONAL SIMULATIONS, BUT GRID GENERATION REMAINS AN OBSTACLE TO QUICK, ACCURATE FLOW-FIELD SIMULATIONS. THE COUPLING OF THESE TWO TECHNIQUES WOULD ALLOW FOR FASTER, MORE ACCURATE GRID GENERATION, AS WELL AS GENERAL PURPOSE GRIDS THAT WOULD BE WELL-SUITED FOR A RANGE OF FLOW-FIELD CONDITIONS. THIS WOULD GREATLY REDUCE THE NEED TO COMPUTE NEW GRID SYSTEMS FOR EACH NEW SET OF FLIGHT CONDITIONS. IN ADDITION, A PARTICULAR ASPECT OF THE CHIMERA SCHEME THAT CAN ALLOW RELATIVE MOTION BETWEEN GRIDS GRIDS CAN BE UTILIZED BY THE SOLUTION-ADAPTIVE TECHNIQUE TO COMPUT TIME-DEPENDENT ADAPTATIONS. THIS PROJECT IS CONCERNED WITH THE DEVELOPMENT OF A COMPUTATIONAL TOOL THAT COMBINES SOLUTION-ADAPTIVE TECHNIQUES WITH AN OVERSET GRID TECHNIQUE TO SOLVE UNSTEADY AERODYNAMIC PROBLEMS IN SUCH AREAS AS POWERED LIFT, HELICOPTER-WAKE RESOLUTION, AND HIGH-ALPHA, ENHANCED MANEUVERABILITY AIRCRAFT. BOTH TECHNIQUES HAVE BEEN USED TO ATTEMPT TO SIMPLIFY THE TASK OF GENERATING EFFICIENT MESHES FOR COMPUTATIONAL SIMULATIONS, BUT GRID GENERATION REMAINS AN OBSTACLE TO QUICK, ACCURATE FLOW-FIELD SIMULATIONS. THE COUPLING OF THESE TWO TECHNIQUES WOULD ALLOW FOR FASTER, MORE ACCURATE GRID GENERATION, AS WELL AS GENERAL PURPOSE GRIDS THAT WOULD BE WELL-SUITED FOR A RANGE OF FLOW-FIELD CONDITIONS. THIS WOULD GREATLY REDUCE THE NEED TO COMPUTE NEW GRID SYSTEMS FOR EACH NEW SET OF FLIGHT CONDITIONS. IN ADDITION, A PARTICULAR ASPECT OF THE CHIMERA SCHEME THAT CAN ALLOW RELATIVE MOTION BETWEEN GRIDS GRIDS CAN BE UTILIZED BY THE SOLUTION-ADAPTIVE TECHNIQUE TO COMPUT TIME-DEPENDENT ADAPTATIONS.