Analysis of turbulent axisymmetric inner near wake

ABSTRACT

An analysis is presented describing the characteristics of mean velocity profile in the axisymmetric turbulent inner near-wake flow behind a body of revolution. The near wake is developing under zero streamwise pressure gradient and the upstream turbulent boundary layer is fully developed. It is shown that the boundary layer condition that exists at the trailing edge can be used to describe the mean velocity profiles in the inner near wake. It is shown that the logarithmic layer of the upstream turbulent boundary layer continues to be valid for some more distance in the near wake, and as the streamwise distance is increased, the logarithmic layer is slowly getting destroyed. It is also shown that the central line velocity exhibits a logarithmic behaviour for large streamwise distance. Results of the analysis have been validated using available experimental data.

KEYWORDS:

• Axisymmetric
• near wake
• boundary layer
• turbulence
• centreline velocity

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Corrigendum

Acknowledgments

Authors acknowledge the support rendered by the Department of Mathematics and Statistical Sciences, BIUST.

Disclosure statement

No potential conflict of interest was reported by the authors.