SMOKE AND CFD VISUALIZATION OF THE FLOW AFTER AN EMC SCREEN IN A SUBRACK MODEL

R. Antón (1, 2, 3) , M. Castiella (2, 3) , H. Jonsson (1, 2) , B. Moshfegh (1)

1 Division of Energy and Mechanical Engineering Department of Technology and Built Environment
2 Division of Energy Technology
3 Department of Mechanical Engineering TECNUN

An experimental parametric study was performed in order to study the flow pattern inside a radio base station subrack model. The parameters that were analysed are the velocity, the EMC screen porosity and the subrack geometry. The technique used to visualize the flow pattern is the smoke-wire technique. The objective is not only to gain insight about the influence of those parameters in the flow pattern of the subrack but also to validate the flow pattern predictions of a detailed CFD model. A further objective is to show the importance of using an accurate CFD model in order to visualize the flow pattern in a situation in which there is a 90 degree turn followed by a perforated plate. The fact that the airflow impinges on the screen in an inclined way means that when the flow collides with the interior face of the hole, it suffers a sudden change in direction, even if the perforated plate is very thin. This change in direction is very important in order to get the right flow pattern after the screen.

Mots clés: RNG k-ε; perforated plate; porosity; EMC screen; subrack; flow pattern; inclined flow; smoke-wire; flow visualization

Domaines: Architectures Matérielles [cs.AR]

R. Antón, M. Castiella, H. Jonsson, B. Moshfegh. SMOKE AND CFD VISUALIZATION OF THE FLOW AFTER AN EMC SCREEN IN A SUBRACK MODEL. THERMINIC 2005, Sep 2005, Belgirate, Lago Maggiore, Italy. pp.212-219. ⟨hal-00189475⟩