A semi-empirical model to determine the wall pressure frequency spectrum beneath a two-
dimensional, pressure gradient turbulent boundary-layer is presented. The model is derived …

This manuscript reports on the effects of application of porous material on the trailing edge of
a 3D cambered airfoil. The numerical study has been carried out following a zonal Overset …

The simulation of broadband noise with CAA techniques is discussed. Unsteady broadband
sound sources are modeled in the time-domain with a highly efficient computational method …

In this contribution, a hybrid zonal simulation tool with volumetric inflow turbulence forcing is
applied to trailing-edge noise of a NACA0012 airfoil with and without a porous insert at …

In this contribution, a hybrid Zonal LES tool is presented that uses a stochastic volume
forcing for “inflow” turbulence generation. The here used hybrid approach is based on an …

The strategic European paper “Flightpath 2050” claims dramatic reductions of noise for
aviation transport scenarios in 2050:“... The perceived noise emission of flying aircraft is …

Within the framework of the German project “Bürgernahes Flugzeug”(Citizen Friendly
Aircraft), we are investigating the effect of installation on propeller sound. A nine-bladed …

Next-generation fan designs featuring large bypass ratios have the potential to reduce rotor–
stator interaction noise of fans. However, these designs pose new challenges and long-held …

For the exploration and validation of the integration of efficient propulsion concepts and new
technologies for future large passenger aircraft, it is necessary to establish suitable design …

M∞- time-averaged free stream Mach number Re- chord-based Reynolds number St-
Strouhal number, Eqs.(4) and (6) u∞ m/s time-averaged free stream velocity α◦ aerodynamic …