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    Rectangular jet with shear layer swirl: Rotation & mixing enhancement

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    Farokhi_2016.pdf (530.0Kb)
    Issue Date
    2016-04-07
    Author
    Farokhi, Saeed
    Taghavi, Ray R.
    Publisher
    Multi-Science Publishing
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    © The Author(s) 2016
    Metadata
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    Abstract
    A rectangular jet emerging from a nozzle with embedded swirl vanes in its exit boundary layer is studied. The swirling shear layer imposes an external torque on the jet boundary where it causes jet rotation in the direction of axis switching, skew deformation as well as enhanced mixing. In moderate aspect ratio rectangular nozzles, e.g. AR = 5:1, a pair of co-rotating streamwise vortices is formed on the narrow boundary of the jet that dominates its dynamics in the near field. A vortex-induced model is developed that accounts for the rotation of the rectangular jet with embedded shear layer swirl. The model also shows that the jet rotation is diminished with increasing aspect ratio, as AR−2. The higher entrainment rate in the rotating jet with skew deformation causes the jet mass flow rate with shear layer swirl to be 20–25% higher than the corresponding plain rectangular nozzle of the same aspect ratio (x/De > 1). The proposed model is validated using computational simulation results of previous investigations that appeared in the literature.
    URI
    http://hdl.handle.net/1808/25533
    DOI
    https://doi.org/10.1177/1475472X16642354
    Collections
    • Aerospace Engineering Scholarly Works [49]
    Citation
    Farokhi, S., & Taghavi, R. R. (2016). Rectangular jet with shear layer swirl: Rotation & mixing enhancement. International Journal of Aeroacoustics, 15(4-5), 526-534.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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