Comparison of numerical schemes applied to CAA problems

To compare numerical methods and boundary conditions for computational aero acoustics (CAA) two-dimensional aeroacoustic benchmark problems are solved. The numerical methods are the dispersion relation preserving scheme (DRP) of Tam et al. [1] and the compact finite difference scheme proposed by Lele [2]. The acoustic boundary conditions applied are the non-reflecting bound ary condition of Thompson [4,5] and the asymptotic boundary condition of Ta m [2]. The benchmark problems used describe the propagation of acoustic, vo rticity and entropy waves relative to a mean flow with varied pow direction .