Unsteady Aerodynamic Applications Using High-Order Unstructured Grid Methods

摘要

The present work considers the use of high-order numerical methods for unsteady compressible aerodynamic solutions. Flows are assumed to be adequately modeled by the 2-D Euler equations. An unstructured grid, finite volume solver is used. The solver implements 2nd-, 3rd- and 4th-order spectral finite volume methods, which use the Roe Riemann solver as the basic numerical flux scheme. Computational efficiency is an important issue for the time-accurate unsteady calculations of interest to the present work. Hence, a paralleliza-tion procedure of the serial solver is carried out in the paper to contribute to the tool numerical efficiency. In this context, the Message Passing Interface standard is adopted as the parallel model for distributed memory frameworks. Simulations are performed for several test cases, including steady, fixed-grid unsteady and moving-grid unsteady flows, in order to validate the procedure implemented. Major interest is in demonstrating the capability of simulating unsteady aerodynamic flows using high-order methods.