Abstract
Mean and rms velocity and temperature measurements are made in the near field of a plane jet for two different sets of conditions at the beginning of the interaction region. In the first, the jet has a nearly top-hat velocity profile and laminar boundary layers at the nozzle exit. Schlieren photography and spectral coherence measurements show that the mixing layer structures are strongly organised and symmetric about the centreline. In the second, the jet issues from a two-dimensional duct with a nearly fully developed velocity profile so that, upstream of the interaction region, turbulent structures should be three-dimensional and asymmetric about the jet centreline. The resulting weak interaction obtained in this case contrasts with the strong interaction measured in the first case.
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Chambers, A.J., Antonia, R.A. & Browne, L.W.B. Effect of symmetry and asymmetry of turbulent structures on the interaction region of a plane jet. Experiments in Fluids 3, 343–348 (1985). https://doi.org/10.1007/BF01830194
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DOI: https://doi.org/10.1007/BF01830194