Two-dimensional Direct Noise Simulation around NACA0012 using Hierarchical Cartesian Gridbased Flow Solver

Abstract

The purpose of this study is to evaluate the ability of non-body fitted Cartesian grid to solve aeroacoustic problems around simple geometry. In order to investigate the aeroacoustic flow simulation ability of the Hierarchical Cartesian grid-based flow solver with immersed boundary method, aeroacoustic sound generated by the flow past NACA0012 airfoil is investigated. By using fourth order schemes at most to discretize the two-dimensional compressible Navier-Stokes equation, the sound scattered on each surface is directly resolved as an unsteady pressure fluctuation. To validate the ability of the code to describe those phenomena, the flow and the acoustics radiation are compared to the result with those of the body fitted grid from the literature.