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首页> 外文期刊>Atomization and Sprays: Journal of the International Institutes for Liquid Atomization and Spray Systems >Air Flow And Droplet Motions Produced By The Interaction of Flat-Fan Sprays And Cross Flows
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Air Flow And Droplet Motions Produced By The Interaction of Flat-Fan Sprays And Cross Flows

机译：扁平风扇喷雾和横流相互作用产生的气流和液滴运动

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摘要

The interaction between the vertical flow induced by downward-pointed sprays and a horizontal cross flow was studied using a boom of overlapping flat-fan sprays in a wind tunnel. Flow patterns were visdualized, and droplet fluxes, velocities, and sizes were measured 2m downwind of the boom using line collectors and a phase-Dopper analyzer, under weak and moderate cross flows, in which the ratio of the cross-flow velocity to the maximum air entrainment velocity into the spray was respectively less and greater thanunity. For weak cross flows, the spray was penetrated only in regoins of low entrained air velocity, with downstream droplet fluxes and air velocity maxima corresponding to the spray edges. For moderate cross flows, the spray was penetrated everywhere across its width. Downstream flux measurements corresponded to the spray centerline, which is the origin of the highest fluex of fine droplets that are "scavenged" by the mean cross flow. Drifting droplets had diameters less than 100 #mu#m and were transported passively by the cross flow.
机译：在风洞中使用重叠的平扇形喷杆的吊杆研究了由向下喷洒引起的垂直流与水平横流之间的相互作用。可视化流动模式，并在弱和中等横流下，使用集流器和相位多普勒分析仪在吊臂顺风2m处测量液滴通量，速度和尺寸，其中横流速度与最大横流之比进入喷雾的空气夹带速度分别小于和大于一个。对于弱的横流，仅在低夹带空气速度的区域中渗透喷雾，下游液滴通量和空气速度最大值对应于喷雾边缘。对于适度的错流，喷雾在整个宽度上都渗透到了各处。下游通量测量值与喷雾中心线相对应，该中心线是被平均横流“扫除”的细小液滴最高通量的起点。漂移液滴的直径小于100＃μm，并通过错流被动地运输。

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