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Vortex dynamics and scalar transport in the wake of a bluff body driven through a steady recirculating flow

机译：在通过稳定的再循环流驱动的钝体之后的涡旋动力学和标量传输

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摘要

The air ventilation system in wide-body aircraft cabins provides passengers with a healthy breathing environment. In recent years, the increase in global air traffic has amplified contamination risks by airborne flu-like diseases and terrorist threats involving the onboard release of noxious materials. In particular, passengers moving through a ventilated cabin may transport infectious pathogens in their wake. This paper presents an experimental investigation of the wake produced by a bluff body driven through a steady recirculating flow. Data were obtained in a water facility using particle image velocimetry and planar laser induced fluorescence. Ventilation attenuated the downward convection of counter-rotating vortices produced near the free-end corners of the body and decoupled the downwash mechanism from forward entrainment, creating stagnant contaminant regions.
机译：宽体飞机机舱中的空气通风系统为乘客提供了健康的呼吸环境。近年来，全球空中交通的增加，加剧了由空气传播的流感样疾病和涉及机载有害物质释放的恐怖威胁的污染风险。尤其是，经过通风机舱的乘客可能会在其尾流中传播传染性病原体。本文提出了由通过稳定的循环流驱动的钝体产生的尾流的实验研究。在水设施中使用粒子图像测速仪和平面激光诱导的荧光获得数据。通风减弱了在主体自由端拐角附近产生的反向旋转涡流的向下对流，并使向下冲洗机构与向前夹带分离，从而形成了停滞的污染物区域。

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