关键词: 垂直气流;气体射流;混合;数值分析

Abstract: A CFD study was performed using 3D SIMPLE program and k ε double equation turbulence model to analyse the effects of geometries and flow parameters on the penetration and mixing of transverse jet.It was found that the size and location of streamwise vortex has a significant effect on the mixing rates.Three jet configurations numerically tested were 1)single hole jet;2)slot jet;3)multile jets.Comparing single hole jet with slot jet,fast mixing rate could be acquired by Vortex Generator Jets,also streamwise vortex.For multiple jets,optimum location of streamwise vortex was found to enhance mixing quickly by adjusting the orifice spacing and momentum ratio.Orifice size has little influence on the jet penetration depth at constant orifice spacing and momentum ratio

Key words: Vertical air current;Gas jet;Mixing;Numerical analysis