APPLICATION OF COMPUTATIONAL FLUID DYNAMICS SOFTWARES FOR 2D ACOUSTICAL WAVE PROPAGATION

The direct noise computation approach in aeroacoustics is an important tool to predict the noise emitted by turbulent flows. A special treatment of the solution algorithms is needed in this case. This paper attempts to show the capabilities of two general purpose Computational Fluid Dynamics codes in a 2D acoustical simulation of the propagation of a pressure pulse. The effect of the time step size, grid resolution, numerical schemes, and solution algorithms were investigated for this purpose. The test showed that the so called density-based formulation gives the most reliable results.