This article is cited in 10 papers

An experimental study of the flow of subsonic flat mini and micro air jets

V. M. Aniskin^ab, V. V. Lemanov^c, N. A. Maslov^ab, K. A. Mukhin^a, V. I. Terekhov^c, K. A. Sharov<sup>c

a</sup> Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University
^c S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences

Abstract: We have experimentally studied subsonic submerged air jets emitted from flat mini and micro nozzles with characteristic dimensions from 22 to 600 $\mu$m in a range of Reynolds numbers 70–2600. The point of laminar-turbulent transition (jet penetration range) was determined using the flow visualization technique. It is established that the penetration range of micro jets can reach 100–300 nozzle calibers. The Reynolds number for the transition to turbulence in flat mini and micro jets reaches high values (1000–2600), which are two to three orders of magnitude greater than the Reynolds numbers for the loss of stability (3–10). Available experimental data are summarized and generalized based on the Reynolds number determined for the jet penetration range.

Received: 27.08.2014

 English version: Technical Physics Letters, 2015, 41:1, 46–49

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