000009162 001__ 9162
000009162 005__ 20141204092414.0
000009162 04107 $$aeng
000009162 046__ $$k12/05/2014
000009162 100__ $$aŠtefan, D.
000009162 24500 $$aStructure of flow fields downstream of two different swirl generators

000009162 24630 $$n18.$$pEngineering Mechanics 2012
000009162 260__ $$bInstitute of Theoretical and Applied Mechanics, AS CR, Prague
000009162 506__ $$arestricted
000009162 520__ $$2eng$$aThis paper discusses the comparison of the flow fields downstream of two different swirl generators. Both swirl generators are used to imitate the flow at the exit of the hydraulic turbine runner and study spatio-temporal behaviour of the swirling flow in the draft tube (i.e. outlet diffuser part of the hydraulic turbine), which undergoes breakdown into vortex rope. Unsteady CFD computations are carried out for identical Reynolds number. Resulting velocity and vorticity profiles are correlated with the structure of the vortex rope. Difference in excited pressure pulsations is illustrated on amplitudefrequency spectra of static wall pressure.

000009162 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009162 653__ $$aswirl generator, vortex rope, velocity profile, vorticity, pressure fluctuations

000009162 7112_ $$aEngineering Mechanics 2012$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2012
000009162 720__ $$aŠtefan, D.$$iRudolf, P.$$iMuntean, S.$$iSusan-Resiga, R. F.
000009162 8560_ $$ffischerc@itam.cas.cz
000009162 8564_ $$s958122$$uhttps://invenio.itam.cas.cz/record/9162/files/057_Stefan_D-FT.pdf$$yOriginal version of the author's contribution as presented on CD, paper (No. 057).
000009162 962__ $$r8924
000009162 980__ $$aPAPER