Jets and wakes in tailored pressure gradient

I. Wygnanski, H. E. Fiedler

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Abstract

Similarity solutions of the boundary-layer equations representing the flow of jets in an external stream and tailored pressure gradients were obtained. These solutions apply to jets in coflowing and counterflowing streams. A number of analytical solutions not previously published were obtained. Of particular interest are the solutions for small-increment jets which imply that a Gaussian velocity profile exists far downstream from the origin of the jet, even in arbitrary pressure gradient. The solutions were extended to turbulent flow using the hypothesis of a constant eddy viscosity, which in turn, was modified to account for intermittency. The theoretical predictions were compared with the measurements of Gartshore in self-preserving wakes and the agreement between theory and experiment is good.

Original languageEnglish (US)
Pages (from-to)2513-2523
Number of pages11
JournalPhysics of Fluids
Volume11
Issue number12
StatePublished - Dec 1 1968
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wygnanski, I., & Fiedler, H. E. (1968). Jets and wakes in tailored pressure gradient. Physics of Fluids, 11(12), 2513-2523.