naa a22 4500 510758584 CHVBK 20180411083131.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1134/S0869864313030025 doi (NATIONALLICENCE)springer-10.1134/S0869864313030025 Sobolev A. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut Intensification of mixing by small-size jets in ejectors with central nozzle [Elektronische Daten] [A. Sobolev] An experimental investigation of the influence of mixing intensification by small-size jets on the startup and characteristics of a gas ejector with central nozzle and a convergent mixing chamber is carried out. It is shown that at high flow rates of the secondary gas, the critical regime is not settled because of the formation of a thick subsonic layer near the chamber wall. In these cases, a stepwise startup was done. The range of critical regimes is limited by the reloading point, at which the velocity near the chamber wall becomes sonic. The critical regime breakdown behind the reloading point occurs due to the upstream propagation of the back pressure through the subsonic layer. The mixing intensification ensures the equalization of the velocity profile and the extension of the range of critical regimes. Despite the improvement of characteristics the mixing in an ejector with the central nozzle remains incomplete. Experimental characteristics are compared with the computed ones. The mixing process is isobaric in the computation without the consideration of dissipative losses because of which the rise of the pressure of a mixture of primary and secondary gases occurs. Pleiades Publishing, Ltd., 2013 convergent chamber nationallicence central nozzle nationallicence mixing intensification nationallicence small-size jets nationallicence critical regime nationallicence experimental and computed characteristics nationallicence Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/3(2013-06-01), 273-276 0869-8643 20:3<273 2013 20 11510 https://doi.org/10.1134/S0869864313030025 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0869864313030025 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Sobolev A. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/3(2013-06-01), 273-276 0869-8643 20:3<273 2013 20 11510 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer