Paper Conference

Proceedings of BauSim Conference 2006: 1st Conference of IBPSA-Germany and Austria

   

Numerische und experimentelle Untersuchungen an komplexen Luftdurchlässen

R. Streblow, D. Müller

Abstract: This paper reports results of computational fluid dynamic simulations (CFD) and measurements using a complex swirl diffuser. For the numerical calculations the diffuser is incorporated and presented in detail in the simulation resolving also the flow inside the diffuser. Velocity measurements are performed in the occupied region supplemented by Laser-DopplerAnemometry (LDA) measurements in the near-zone of the diffuser. The flow pattern is also visualized by smoke and helium filled bubbles. The analyzed diffuser shows a complex flow pattern with transient flow structures in the induced room air. The calculated velocities und the velocity distribution in the near-zone of the diffuser agree rather well with measurements. But the use of a standard two equation turbulence model is not able to resolve the vortices revealed in the experiments.
Pages: 196 - 198