Local velocity scaling in upward flow to tooth impeller in a fully turbulent region

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dc.contributor.authorŠulc, Radek
dc.contributor.authorDitl, Pavel
dc.contributor.authorFořt, Ivan
dc.contributor.authorJašíková, Darina
dc.contributor.authorKotek, Michal
dc.contributor.authorKopecký, Václav
dc.contributor.authorKysela, Bohuš
dc.date.accessioned2020-01-10T07:53:54Z
dc.date.available2020-01-10T07:53:54Z
dc.date.issued2019
dc.description.abstractThe hydrodynamics and flow field were measured in an agitated vessel using 2-D Time Resolved Particle Image Velocimetry (2-D TR PIV). The experiments were carried out in a fully baffled cylindrical flat bottom vessel 400 mm in inner diameter agitated by a tooth impeller 133 mm in diameter. Distilled water was used as the agitated liquid. The velocity fields were investigated in the upward flow to the impeller for three impeller rotation speeds- 300 rpm, 500 rpm and 700 rpm, corresponding to a Reynolds number in the range 94 000 < Re < 221 000. This means that fully-developed turbulent flow was reached. This Re range secures the fully-developed turbulent flow in an agitated liquid. In accordance with the theory of mixing, the dimensionless mean and fluctuation velocities in the measured directions were found to be constant and independent of the impeller Reynolds number. On the basis of the test results the spatial distributions of dimensionless velocities were calculated. The axial turbulence intensity was found to be in the majority in the range from 0.4 to 0.7, which corresponds to the middle level of turbulence intensity.cs
dc.format.extent9 strancs
dc.identifier.doi10.1051/epjconf/201921302081
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154337
dc.identifier.urihttps://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02081.pdf
dc.language.isocscs
dc.publisherE D P SCIENCES, 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE
dc.relation.ispartofseriesEPJ Web of Conferences
dc.titleLocal velocity scaling in upward flow to tooth impeller in a fully turbulent regioncs
dc.typeProceedings Paper
local.article.numberUNSP 02081
local.event.edate2018-11-16
local.event.locationPlanetarium & Stefaniks Observ, Prague, CZECH REPUBLIC
local.event.sdate2018-11-13
local.event.title13th International Conference on Experimental Fluid Mechanics (EFM)
local.identifier.publikace5869
local.relation.volume213
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