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采用PIV设备测量了方腔通道内气体液雾两相交叉横向流的掺混,液滴通过旋流雾化喷嘴产生,获得了沿横流方向不同掺混横截面的液滴分布图和液滴运动流线图.比较了三种喷嘴布置角度(60°,90°,120°)在不同气流速度下的掺混效果.结果表明:在横流作用和壁面约束的影响下,流场中出现不同尺度的漩涡,大涡的卷吸与离心作用导致液滴分布不均匀,影响了雾滴与气相的掺混.随着掺混的发展,大涡的强度和尺寸均减小,对雾滴影响减弱,掺混变好;三种喷嘴布置角度下,60°掺混最好,90°次之,120°最差.

An experimental investigation of two-phase turbulent mixing of spray droplets with crossflow in a rectangular duct is presented.The liquid droplets are produced by a pressure swirl nozzle.The distribution of water droplets on the cross section and the flow vector field are measured with PIV technology.The effects of a nozzle injection angle(60°,90°or 120°)and cross airflow velocities in the mixing process are addressed.We conclude that the entrainment and centrifugal force of large vortex leads to uneven droplet distribution and exerts influences on the mixing of droplets and cross flow.Both the strength and the size of large eddies decrease with the mixing development,resulting in weak impact on the droplet.Among three injection angles of nozzle,the nozzle with 60°has the best mixing effect,the nozzle with 90°take second place,and the nozzle with 120°is the worst.

参考文献

[1] Kachihwaha SS.;Dhar PL.;Kale SR. .EXPERIMENTAL STUDIES AND NUMERICAL SIMULATION OF EVAPORATIVE COOLING OF AIR WITH A WATER SPRAY .1. HORIZONTAL PARALLEL FLOW[J].International Journal of Heat and Mass Transfer,1998(2):447-464.
[2] Kachhwaha SS.;Dhar PL.;Kale SR. .EXPERIMENTAL STUDIES AND NUMERICAL SIMULATION OF EVAPORATIVE COOLING OF AIR WITH A WATER SPRAY .2. HORIZONTAL COUNTER FLOW[J].International Journal of Heat and Mass Transfer,1998(2):465-474.
[3] Porcheron E;Lemaitre P;Nuboer A et al.Experimental Investigation in the TOSQAN Facility of Heat and Mass Trartsfers in a Spray for COntainment Application[J].NU-clear Engineering and Design,2007,237:1862-1871.
[4] Orme M .Experiments on Droplet Collisions,Bounce,Co-alescence and Disruption[J].Progress in Energy and Combustion Science,1997,23:65-79.
[5] 张会强,华丽君.气粒两相湍流中颗粒倾向性分布现象的研究[J].工程热物理学报,2008(03):443-446.
[6] Han DH.;Mungal MG.;Orozco V. .Gross-entrainment behavior of turbulent jets injected obliquely into a uniform crossflow[J].AIAA journal,2000(9):1643-1649.
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