000014736 001__ 14736
000014736 005__ 20161115100200.0
000014736 04107 $$aeng
000014736 046__ $$k2016-08-21
000014736 100__ $$aLe Gal, Patrice
000014736 24500 $$aRotating turbulence in a rotor/stator cavity at high Reynolds number

000014736 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014736 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014736 506__ $$arestricted
000014736 520__ $$2eng$$aThis communication reports an experimental investigation of a turbulent flow confined within a rotor/stator cavity at high Reynolds numbers. The experiments have been driven by changing both the rotation rates of the disk and the density of the working fluid (sulfur hexafluoride near its critical point) by imposing the operating temperature and pressure inside a thermalized and pressurized vessel. This original set-up allows to get Reynolds numbers as high as 2 107 with potential compressibility effects as the Mach number can reach 0.5. Pressure measurements reveal that the resulting fully turbulent flow shows both a direct and an inverse cascade in accordance with Kraichnan’s conjecture. For the highest Reynolds numbers, the spectra are however dominated by low-frequency oscillations involving large scale modes with azimuthal wavenumbers m = 1, 2, 3 and 4. We interpret these modes as acoustico-inertial modes for which we have calculated their dispersion relation as function of the Mach number.

000014736 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014736 653__ $$a

000014736 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014736 720__ $$aLe Gal, Patrice
000014736 8560_ $$ffischerc@itam.cas.cz
000014736 8564_ $$s80639$$uhttps://invenio.itam.cas.cz/record/14736/files/TS.FM14-3.05.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1425, code TS.FM14-3.05
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000014736 962__ $$r13812
000014736 980__ $$aPAPER