Numerical Investigation on Blade/Wake-Interaction Noise Generation

This work investigates the potential of short-wave instability developing near blade tip vortex as the main source of blade/wake-interaction noise. In this aim, a numerical simulation of these instabilities is performed considering a simplified wake geometry. The aerodynamic fields are extracted to determine the blade pressure response using the unsteady compressible airfoil theory. Finally a loading-noise computation is performed. All the results obtained from these computations are compared with the experimental data and a good qualitative agreement is found.