ZURUECK HOCH VOR INHALT SUCHEN

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Proposing Institution

Institute of Computational Modeling in Civil Engineering
Project Manager

Prof. Dr.-Ing. Manfred Krafczyk
Pockelsstr. 3
38106 Braunschweig
Abstract
Flow noise during takeoff and landing of commercial aircrafts can be substantially reduced by the use of porous surface layers in suitable sections of wing profiles. On the other hand (passive) porosity and roughness of surfaces tend to have an adverse effect on the boundary layer and thus on the lift of wings. This motivates the need to be able to predict the aerodynamic effects of porous segments of the wing surface by numerical methods for aerodynamic design of wings, taking into account porosity and roughness as a function of Reynolds number. The application of the RANS equations for this task requires additional modeling terms such as the permeability and the Kozeny-Carman parameter as well as the turbulent fluctuations of the velocity field to be determined by massively parallel DNS/LES simulations which are conducted in this project by the recently introduced Cumulant version of the Lattice-Boltzmann method (LBM). A key objective of the project is the identification of aeroacoustic effects of porous inlays by means of resolved pore scale simulations spanning six orders of magnitude in space and time.

Impressum, Conny Wendler