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Passing Frequency of Vortical Structures in the Near Field of an Axisymmetric Turbulent Jet

International Journal of Mechanical Engineering
© 2015 by SSRG - IJME Journal
Volume 2 Issue 10
Year of Publication : 2015
Authors : Brian D. Landers, Peter J. Disimile
10.14445/23488360/IJME-V2I10P103
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How to Cite?

Brian D. Landers, Peter J. Disimile, "Passing Frequency of Vortical Structures in the Near Field of an Axisymmetric Turbulent Jet," SSRG International Journal of Mechanical Engineering, vol. 2,  no. 10, pp. 5-9, 2015. Crossref, https://doi.org/10.14445/23488360/IJME-V2I10P103

Abstract:

This paper presents the results from an experimental study of an axisymmetric jet exiting a circular tube. The exiting flow was fully developed and turbulent with a Reynolds number of 7,500 based on the jet diameter. Utilizing both constant temperature anemometry and flow visualization, the passing frequency of the vortical structures was measured at four streamwise locations downstream of the jet exit (i.e. 1D, 2D, 3D, and 4D). The results show a decrease in passing frequency with increasing distance downstream of the jet exit. The results were compared to the ‘preferred mode’ of an axisymmetric jet found in previous studies.

Keywords:

Axisymmetric Turbulent Jet, ‘Preferred Mode’, Flow Visualization, Shedding Frequency.

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