V. M. Aniskin, A. A. Maslov, S. G. Mironov, I. S. Tsyryulnikov, I. V. Timofeev, “An experimental study of the structure of supersonic flat underexpanded microjets”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2015, Volume 41, Issue 10,Pages <nobr>97

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An experimental study of the structure of supersonic flat underexpanded microjets

V. M. Aniskin^ab, A. A. Maslov^ab, S. G. Mironov^ab, I. S. Tsyryulnikov^ab, I. V. Timofeev^a

^a Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University

Abstract: We have experimentally studied the structure of supersonic flat underexpanded room-temperature air jets escaping from micro nozzles with characteristic heights from 47 to 175 $\mu$m and widths within 2410–3900 $\mu$m in a range of Reynolds numbers of 1280–9460. The dimensions of the first shock cell are established. The supersonic core length of supersonic flat underexpanded air jets has been determined for the first time. A flow regime with a large supersonic core length has been observed for air jets escaping from a 47-$\mu$m-high nozzle.

Received: 09.12.2014