|
|
|
INVESTIGATION OF ROUND MICROJET IN A NARROW CHANNEL
Shestakov M.V.
Institute of Thermophysics SB RAS, Novosibirsk, Russia
|
Citation:
Shestakov, M.V., (2012) Investigation of round microjet in a narrow channel, Modern Science: Researches, Ideas, Results, Technologies, Iss. #2(10), PP. 355 - 360.
|
|
Keywords:microjet; bounded jet flows; vortex structures |
|
Abstracts:
Results of visual investigation of flow structure of round microjet in narrow channel are presented. Investigations were done in laminar and turbulent flow regimes. Using high-speed visualization data four jet flow regimes in shallow channel were recognized: laminar, laminar with large-scale vortex structures, transitional and turbulent regimes. It was shown that laminar-turbulent transition is connected with instability sinusoidal mode development. Laminar and transitional flow regimes are characterized by strong dependence of jet laminar zone length on Reynolds number. For turbulent regime this dependence is weak and length of jet laminar zone decreases with growth of Reynolds number. |
|
References:
Viilu A. 1960 Preliminary Report of Massachusetts Institute of Technology (Dept. Aeronautics and Astronautics) for NASA. Grant No. NsG-31-60. Reynolds A.J. Observations of a liquid-toliquid jet // J. Fluid Mech. - 1962. - Vol. 14. - P. 552 - 556. Becker H.A., Massaro T.A. Vortex evolution in a round jet // J. Fluid Mech. - 1968. - Vol. 31- part 3. - P. 435- 448. Koller-Milojevic D., Schneider W. Free and confined jets at low Reynolds numbers// Fluid Dynamics Research. - 1993 - 12. - pp. 307-322. В.Д. Жак, В.А. Мухин, В.Е. Накоряков, С.А. Сафонов. Распространение затопленной струи в узкой щели.// ПМТФ. -1985 - Том 151. - № 3. Перепелица Б.В., Шестаков М.В. Пространственная структура потока при истечении круглой струи в узкий канал.// Теплофизика и аэромеханика. - 2009. - том 16 - №1- C. 226-229. Kozlov V.V., Grek G.R, Litvinenko Yu.A., Kozlov G.V., Litvinenko M.V. Subsonic round and plane jets in the transversal acoustic field // Vestnik NSU. Physics. - 2010. - T 5. - N. 2. - C 28 - 42. C. Gau, C.H. Shen, and Z.B. Wang, Peculiar Phenomenon of Micro-Free-Jet Flow, Physics of Fluids, Vol. 21, No. 9, Art no. 09 2001, 2009. Bilsky A.V., Markovich D.M., Shestakov M.V., Tokarev M.P. Tomographic PIV and planar Time-resolved PIV measurements in a turbulent slot jet // Proc. of the 16th international symposium on applications of laser techniques to fluid mechanics, Lisbon, pp 09-12 July, 2012 Прандтль Л. Гидроаэромеханика. Ижевск. 2000. - С. 206.
|
|
|
