TWO-DIMENSIONAL SHOCK-SOUND INTERACTION ON UNSTRUCTURED MESHES

The use of upwind finite volume methods for the twodimensional Euler equations on unstructured meshes is investigated, to simulate aeroacoustic phenomena. Higher order accuracy is obtained via a piecewise polynomial that reconstructs pointwise values from cell averages. Both adaptive-stencil essentially non-oscillatory, and fixed-stencil least-squares reconstruction techniques, are used. The numerical dissipation and dispersion of the two methods are tested by simulating the propagation of a plane acoustic wave in a constant cross-section duct. Results for the simulation of the interaction of an acoustic wave with a steady shock are also presented.