Vita Publikationen

Structural aeroacoustic interactions are of great interest in the design and manufacture of aerospace structures. During the lift off and the early phases of the launch various external loads like steady accelerations, random and broadband frequency vibrations, acoustic loads due to jet noise and fluid–structure interactions act on the lightweight panel structure of the payload fairing. [...]

A hybrid computational fluid dynamics (CFD) and computational aeroacoustics (CAA) method is used to compute the acoustic field of turbulent hot jets at a Reynolds number and a Mach number . The flow field computations are performed by highly resolved large-eddy simulations (LES), from which sound source terms are extracted to compute the acoustic field by solving the acoustic perturbation equations (APE). [...]

A discrete adjoint framework on the basis of algorithmic differentiation (AD) is developed for trailing-edge noise minimization. Turbulent flow through porous media is modeled based on the conservative transport equations filtered by a local volume-averaging method in which the effect of the porous media is modeled as viscous source terms. [...]

The impact of porous material with variable properties on trailing-edge noise is analyzed by a high resolution large-eddy simulation/computational aeroacoustics (LES/CAA) approach. Two trailing edge shapes, i.e., a sharp edge and a rounded edge, with solid and porous surfaces are considered. [...]

The impact of porous surfaces on the near-wall turbulent structures and the generated trailing-edge noise is analyzed for several trailing-edge shapes of finite thickness using a high resolution large-eddy simulation (LES)/computational aeroacoustics (CAA) method. The porous surface of the trailing edge is defined by the porosity and the viscous permeability determined by the solution of a turbulent flat plate boundary layer at a Reynolds number 1280 based on the displacement thickness in the inflow cross section. [...]

INTRODUCTIONZinc (Zn) is an essential micronutrient for many organisms, including plants and humans [1]. Today about 20% of the population is estimated to suffer from Zn deficiency [2], and relies on plants for their Zn uptake. [...]