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1.
Gonilni mehanizmi kavitacijskega vrtinca v vstopnem vodu radialne črpalke
Andrej Predin, Ignacijo Biluš, 2001, original scientific article

Abstract: 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.
Keywords: radial pumps, cavitation, swirl, operating regime, pressure pulsation measurements
Published: 10.07.2015; Views: 785; Downloads: 15
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2.
Experimental analysis of the impact of particles on the cavitating flow
Boštjan Gregorc, Andrej Predin, Drago Fabijan, Roman Klasinc, 2012, original scientific article

Abstract: The purpose of this paper is to present an analysis of the impact of solid particles on the development of cavitating flow conditions around a hydrofoil. Experimental studies have been conducted in a cavitation tunnel with three different mixtures of particles and water. We used a particle-like properties, such as are found in river water, and with increasing mass concentration. We performed measurements of torque and the relative noise in the hydrofoil. The point in the formation of vapour phase on the hydrofoil and the pronounced frequency effect were determined by measuring the relative noise. Based on the analysis the results show that the particles increase the intensity and extent of cavitation.
Keywords: particles, cavitation, noise, measurements
Published: 10.07.2015; Views: 5123; Downloads: 67
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