Publications de nos chercheuses et chercheurs

Two side-view mirrors only differing by their caps, whose whistlings were recorded in anechoic wind tunnel during a Hot-Wire Anemometer (HWA) and synchronized microphones campaign, as well as a Time Resolved Particle Image Velocimetry (TR-PIV) and synchronized microphone experiment, are numerically studied. A first study using 2D transient incompressible simulations showed that a normal to the wall random blowing could numerically trigger the whistling generation. 3D transient compressible simulations, representative of the experimental conditions, were then performed using the PowerFLOW Lattice Boltzmann Method (LBM) based solver. The general flow topology is well reproduced and matches the experimental data. The whistling source mechanism has been identified for one of the geometries, however, the whistling generation is not captured by the simulation for the other geometry. Therefore, similarly to the 2D simulation, several blowings were applied to the 3D simulation, as an attempt to trigger the whistling generation in a predictive scenario.