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

We have experimentally studied subsonic submerged air jets emitted from flat mini and micro nozzles with characteristic dimensions from 22 to 600 μm in a range of Reynolds numbers 70–2600. The point of laminar-turbulent transition (jet penetration range) was determined using the flow visualization t...

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Bibliographic Details
Published inTechnical physics letters Vol. 41; no. 1; pp. 46 - 49
Main Authors Aniskin, V. M., Lemanov, V. V., Maslov, N. A., Mukhin, K. A., Terekhov, V. I., Sharov, K. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2015
Subjects
Classical and Continuum Physics
Physics
Physics and Astronomy
Turbulent Transition
Reynolds Number
Acetone Vapor
Technical Physic Letter
Nozzle Height
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Summary:We have experimentally studied subsonic submerged air jets emitted from flat mini and micro nozzles with characteristic dimensions from 22 to 600 μm 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.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785015010034