20.500.12556/DKUM-53187 Gonilni mehanizmi kavitacijskega vrtinca v vstopnem vodu radialne črpalke The driving mechanisms of the cavitation swirl in the entrance pipe of a radial pump V prispevku je podana analiza gonilnih mehanizmov in tlačnih utripanj povezanih s pojavom kavitacijskega vrtinca v vstopnem vodu radialne črpalke. Kavitacijski vrtinec je rezultat interakcije številnih zapletenih sekundarnih tokovnih pojavov, ki nastopijo kot posledica obratovanja s podoptimalnimi pretoki v kavitacijskem obratovalnem režimu. Izvedene in predstavljene so tudi meritve tlačnih utripanj v vstopnem vodu radialne črpalke na različnih razdaljah od rotorskega ustja na sklenjeni kavitacijski merilni progi. Meritve so izvedene pri različnih vrtilnih hitrostih in različnih tlakih nad spodnjo vodno gladino. Podani so tudi rezultat frekvenčne analize posnetih tlačnih utripanj. Analyses are given of the driving mechanisms and pressure pulsations relating to the cavitation swirl in the entrance pipe of a radial pumpe. The appearance of cavitation swirl is a result of a complicated secondary flow interaction, which appears as a consequence of the pump operating at small, under-optimum capacities in the cavitation operating regime. Results of the flow pressure pulsation measurements in the entrance pipe of the radial pump are reported. These measurements were made at different distances from the impeller eye, in the upstream direction at the closed cavitation measuring test ring with the pump operating at different impeller speeds and at different values of gas (air) pressure over the lower liquid (water) position. Results are also given for the frequency analyses of the measured flow pressure. radial pumps cavitation swirl operating regime pressure pulsation measurements true false false Association of Mechanical Engineers and Technicians of Slovenia et al. Slovenski jezik Slovenski jezik Delo ni kategorizirano 2015-07-10 19:37:30 2015-07-10 19:37:30 2022-06-02 03:09:23 2019-07-11 08:03:46 2001 0 0 str. 234-247 št. 6 Letn. 47 2001 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.67:532.5 762116 4767003 0039-2480 URN:SI:UM:DK:XL2E9UK4 http://www.dlib.si/details/URN:NBN:SI:doc-XCSHZCQQ 1 https://dk.um.si/Dokument.php?lang=slv&id=77747 Fakulteta za strojništvo 0 0 0