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.


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    Title :

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


    Contributors:

    Published in:

    Experiments in Fluids ; 53 , 3 ; 747-763


    Publication date :

    2012


    Size :

    17 Seiten




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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