36 KB1465 KB32 KB199920252008Duhovnik, JožeHočevar, MarkoRihtaršič, JanezŠubelj, Matjaž13 straništevilka:2letnik:54str. 81-93ISSN:0039-2480COBISSID:10496539URN:URN:NBN:SI:doc-1IJ24LNYenAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikcentrifugalni rotorjinumerične simulacijetok tekočinvizualizacijaFlow analysis through the centrifugal impeller of a vacuum cleaner unit|Flow through the centrifugal impeller of a vacuum cleaner unit was investigated. This was done using experimental measurements and numerical simulations. Two different operational points were selected for the experiment. Experiments were performed using flow visualization with the use of the passive seeding particles. The rotational speed was reduced by using the theory of dynamical similarity where water was used as a flow medium instead of air. Numerical simulations were performed by using compressible and incompressible fluids. Flow through impeller channels is presented as particle trajectories and relative velocities for experimental approach and as flow streamlines and relative velocities for numerical approachV prispevku je z eksperimentom in numerično simulacijo prikazana vizualizacija toka tekočine skozi centrifugalno puhalo sesalne enote. Za eksperiment sta bila izbrana dva obratovalna režima. Eksperimentalna vizualizacija toka je bila izvedena z dodajanjem pasivnih zrn tekočine. Z uporabo teorije dinamične podobnosti smo znižali vrtilno frekvenco in namesto zraka je bila kot delovno sredstvo uporabljena voda. Primerjalne numerične simulacije smo izvedli z uporabo stisljive in nestisljive tekočine. Pri eksperimentu je tok tekočine skozi kanale puhala predstavljen s potmi pasivnih zrn in z relativnimi hitrostmi, medtem ko je pri numerični simulaciji predstavljen s tokovnicami in z relativnimi hitrostmiTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo