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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Experimental investigation of the energy budget and enstrophy in the near field of a rectangular turbulent jet

page 12
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.430
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要約

In the present study, terms of the energy budget and enstrophy in the near field of a rectangular turbulent jet with aspect ratio 6 have been experimentally estimated. Measurements have been conducted in a jet with Reynolds number ReD = 21000 at distances from the nozzle, x/D =1, 3, 6 and 11, where D is the width of the nozzle. The presented data were obtained using an in-house constructed 12-sensor hot wire probe consisting of three closely separated orthogonal 4-hot wire velocity arrays. The terms of turbulent energy balance at x/D=11 show important differences to those of a plane jet. On the other hand, measurements of most of the terms of the transport equation for fluctuating enstrophy at x/D=11 indicate that the rotation and stretching by the fluctuating strain rate is balanced by the viscous dissipation of vorticity.

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