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A visual study on elliptical jets in cross flow

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Abstract

Laser-induced fluorescence technique is used to study the near-field of an elliptical jet exiting normally into a cross flow, for elliptic jet having aspect ratio of 2 and 3. Results show that the non-uniform curvature of the elliptic geometry causes the leading-edge vortices at the interface between the jet and the cross flow to behave differently from that of a circular jet. In particular, when the major-axis is aligned with the cross flow there is an intense interaction between the leading-edge vortices which culminates in the pairing of adjacent vortices. The pairing is suppressed when the major axis is perpendicular to the cross flow.

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References

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Authors and Affiliations

  1. Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore

    New T. H., Lim T. T. & Luo S. C.

Authors
  1. New T. H.
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  2. Lim T. T.
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  3. Luo S. C.
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Additional information

Tze How New: He received his B.Eng (Hons) degree in Mechanical Engineering in 1998 from the National University of Singapore (NUS), after which he continues to pursue his M.Eng and Ph.D in the area of fluid mechanics at the same institute. In the midst of finishing his Ph.D under the supervision of Associate Professors T. T. Lim and S. C. Luo, he is currently holding a research position at the Temasek Laboratories of NUS in the area of aerodynamics studies, specializing in drag reduction. His main research interests include vortex dynamics, flow visualization techniques and particle image velocimetry.

Luo Siao Chung: He is an Associate Professor in the Department of Mechanical Engineering, National University of Singapore. He obtained his Ph.D from Imperial College, University of London in 1985. His research interest is mainly in the area of aerodynamics, which includes problems related to 2- and 3-D flow past single or multiple cylinder(s), flow-induced vibrations of structures and jet in cross flow etc.

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New, T.H., Lim, T.T. & Luo, S.C. A visual study on elliptical jets in cross flow. J Vis 5, 129–136 (2002). https://doi.org/10.1007/BF03182421

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  • DOI: https://doi.org/10.1007/BF03182421

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