Effects of Reynolds number on some properties of a turbulent jet from a long square pipe

M Xu, A Pollard, J Mi, F Secretain, H Sadeghi - Physics of Fluids, 2013 - pubs.aip.org
The flow in the near-to-intermediate field of a jet emanating from a long square pipe is
investigated using hot-wire anemometry. The data include distributions of the mean and
high order turbulence moments over 8000< Re< 50 000 along the jet centreline. It is
demonstrated that the far-field rates of the mean velocity decay and spread, as well as the
asymptotic value of the streamwise turbulent intensity, all decrease as Re increases for Re≤
30 000; however, they become approximately Re-independent for Re> 30 000. It follows that …
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