TWO AND THREE DIMENSIONAL CFD MODELS OF THE EFFECTIVENESS OF AN AIR CURTAIN USED TO RESTRICT COLD ROOM INFILTRATION
The aim of this study was to compare the measured effectiveness of an air curtain device at different jet velocities against predictions from 2D and 3D computational fluid dynamics (CFD) models. The predicted maximum effectiveness of the air curtain was 0.13 higher than measured for the 2D model and 0.05 lower than measured for the 2D model. The 2D model under predicted the optimum jet velocity by 7.5 m.s-1, the 3D model over predicted it by 4 m.s-1. CFD has shown that the flow from this air curtain cannot be considered as 2D. The central part of the jet is deflected away from the cold store by the Coanda effect caused by the air curtain device’s fan body. The edges of the jet are deflected into the cold store by the stack pressures and turn into the void caused by the deflected central jet.
A.M.Foster M.J.Swain S.J.James
FRPERC, University of Bristol, Churchill Building, Langford, N. Somerset BS40 5DU, UK
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）