Experiments on the unsteady ground vortex

John Michael Cimbala, Donald P. Gaublomme, David R. Stinebring, Michael L. Billet

    Research output: Contribution to conferencePaper

    Abstract

    The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency "puffing" action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.

    Original languageEnglish (US)
    DOIs
    StatePublished - Dec 1 1989
    EventAerospace Technology Conference and Exposition - Anaheim, CA, United States
    Duration: Sep 25 1989Sep 28 1989

    Other

    OtherAerospace Technology Conference and Exposition
    CountryUnited States
    CityAnaheim, CA
    Period9/25/899/28/89

    Fingerprint

    Vortex flow
    Experiments
    Motion pictures
    Fluids

    All Science Journal Classification (ASJC) codes

    • Automotive Engineering
    • Safety, Risk, Reliability and Quality
    • Pollution
    • Industrial and Manufacturing Engineering

    Cite this

    Cimbala, J. M., Gaublomme, D. P., Stinebring, D. R., & Billet, M. L. (1989). Experiments on the unsteady ground vortex. Paper presented at Aerospace Technology Conference and Exposition, Anaheim, CA, United States. https://doi.org/10.4271/892281
    Cimbala, John Michael ; Gaublomme, Donald P. ; Stinebring, David R. ; Billet, Michael L. / Experiments on the unsteady ground vortex. Paper presented at Aerospace Technology Conference and Exposition, Anaheim, CA, United States.
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    abstract = "The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency {"}puffing{"} action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.",
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    Cimbala, JM, Gaublomme, DP, Stinebring, DR & Billet, ML 1989, 'Experiments on the unsteady ground vortex' Paper presented at Aerospace Technology Conference and Exposition, Anaheim, CA, United States, 9/25/89 - 9/28/89, . https://doi.org/10.4271/892281

    Experiments on the unsteady ground vortex. / Cimbala, John Michael; Gaublomme, Donald P.; Stinebring, David R.; Billet, Michael L.

    1989. Paper presented at Aerospace Technology Conference and Exposition, Anaheim, CA, United States.

    Research output: Contribution to conferencePaper

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    AU - Gaublomme, Donald P.

    AU - Stinebring, David R.

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    AB - The ground vortex formed by a jet impinging on the ground in the presence of a cross flow has been studied experimentally. High speed motion pictures and spectral measurements were obtained to study the unsteady features of this flowfield. A very low frequency "puffing" action was observed. Since this unsteadiness could not be correlated with any other oscillations in the flowfield, the low frequency oscillations must come from the gross features of the ground vortex itself. Namely, jet fluid accumulates in the ground vortex until the vortex is so large that the flowfield breaks up, the ground vortex is swept away, a new smaller vortex forms, and the process repeats itself.

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    Cimbala JM, Gaublomme DP, Stinebring DR, Billet ML. Experiments on the unsteady ground vortex. 1989. Paper presented at Aerospace Technology Conference and Exposition, Anaheim, CA, United States. https://doi.org/10.4271/892281