000014490 001__ 14490
000014490 005__ 20161115100153.0
000014490 04107 $$aeng
000014490 046__ $$k2016-08-21
000014490 100__ $$aWang, Tiejin
000014490 24500 $$aExperiment on nonliner growth of supersonic mixing layers

000014490 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014490 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014490 506__ $$arestricted
000014490 520__ $$2eng$$aIt is known that large scale structures play important role in the growth of supersonic mixing layer, and a great deal of experimental works focused on the characteristics and functions of large scale structure in the past, unfortunately, little experiments have been conducted on the spatial evolution of these structures up to now, which may be helpful to solve the issues of growth rate. In the present study, the evolution of large scale structures of the planar supersonic mixing layer at convective Mach numbers of 0.25, 0.5 and 0.7, respectively formed by the streams with the responding Mach number combination of 2.0 & 1.5, 3.0 & 2.0 and 2.0 & 0.6, is visualized using a planar laser Mie scattering (PLMS) technique. The instantaneous images at convective Mach number of 0.25 are respectively obtained by seeding ethanol vapor as a marker in one stream in each experiment, and those at convective Mach numbers of 0.5 and 0.7 were obtained by seeding the ethanol vapor in the stream of Mach number 2.0. The results show that the spatial evolution of large scale structures is comprised primarily of three parts, which is in some degree consistent with the structural investigations of linear stability theory. The different growth rates of large scale structure in the three parts suggest that only one coefficient used as previous investigations is not enough to represent the growth rate of supersonic mixing layer. Specific issues regarding the description of growth rate are discussed in detail.

000014490 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014490 653__ $$a

000014490 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014490 720__ $$aWang, Tiejin
000014490 8560_ $$ffischerc@itam.cas.cz
000014490 8564_ $$s84593$$uhttps://invenio.itam.cas.cz/record/14490/files/TS.FM04-3.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 673, code TS.FM04-3.02
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000014490 962__ $$r13812
000014490 980__ $$aPAPER