First Results of the Numerical Simulations of the Flow in the Transonic Wind Tunnel Göttingen with Perforated Test Section at Mach 1.1

Abstract

This work presents the first results of the numerical simulations of the Transonic Wind Tunnel Göttingen with perforated test section. The special feature of this study lies in the fact that all perforation holes of the perforated test section are explicitly simulated. The focus lies on the qualitative investigation of the flow topology in the perforated test section. The effect of different static pressures in the plenum and diffusor, different turbulence models and different CFD codes on the flow field inside the test section and the flow through the perforated walls is evaluated. The simulations show the development distinct pattern of waves originating from the perforation holes that can’t be reproduced by using conventional boundary conditions. While most simulations are run on a symmetric quarter model of the full wind tunnel, a comparison with simulations of the full geometry is also carried out to assess the influence of the symmetry assumption.