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    Passive Control of Supersonic Rectangular Jets through Boundary Layer Swirl

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    Issue Date
    2013
    Author
    Han, Sang Yeop
    Taghavi, Ray R.
    Farokhi, Saeed
    Publisher
    De Gruyter
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    Mixing characteristics of under-expanded supersonic jets emerging from plane and notched rectangular nozzles are computationally studied using nozzle exit boundary layer swirl as a mean of passive flow control. The coupling of the rectangular jet instability modes, such as flapping, and the swirl is investigated. A three-dimensional unsteady Reynolds-Averaged Navier-Stokes (RANS) code with shock adaptive grids is utilized. For plane rectangular nozzle with boundary layer swirl, the flapping and spanwise oscillations are captured in the jet’s small and large dimensions at twice the frequencies of the nozzles without swirl. A symmetrical oscillatory mode is also observed in the jet with double the frequency of spanwise oscillation mode. For the notched rectangular nozzle with boundary layer swirl, the flapping oscillation in the small jet dimension and the spanwise oscillation in the large jet dimension are observed at the same frequency as those without boundary layer swirl. The mass flow rates in jets at 11 and 8 nozzle heights downstream of the nozzles increased by nearly 25% and 41% for the plane and notched rectangular nozzles respectively, due to swirl. The axial gross thrust penalty due to induced swirl was 5.1% for the plane and 4.9% for the notched rectangular nozzle.
    Description
    This is the published version.
    URI
    http://hdl.handle.net/1808/19353
    DOI
    https://doi.org/10.1515/tjj-2013-0012
    Collections
    • Aerospace Engineering Scholarly Works [48]
    Citation
    Han, Sang Yeop, Ray R. Taghavi, and Saeed Farokhi. "Passive Control of Supersonic Rectangular Jets through Boundary Layer Swirl." Int. J. Turbo Jet-Engines 30.2 (2013): n. pag. http://dx.doi.org/10.1515/tjj-2013-0012.

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    KU Libraries
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    Lawrence, KS 66045
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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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