Applications of a Highly Efficient Numerical Method for Overset-Mesh Moving BodyProblems

摘要

Several improvements have been incorporated into the XAIR overset-mesh flowsolver which substantially improve the capability of the code to perform time-accurate solutions. These improvements include implementing an upwind flux formulation combined with a quasi-Newton relaxation time-stepping strategy. The code includes a very stable k-e turbulence model which can be used with or without wall function boundary conditions. Results are presented for two moving body cases and two unsteady flows. The new code has demonstrated reductions of CPU times over traditional alternating direction implicit (ADI) methods by factors of 10 for inviscid flows and by orders of magnitude for viscous flows.