Original title: Dynamika kavitujícího proudění za clonou
Translated title: Dynamics of cavitating flow behind the orifice
Authors: Kubina, Dávid ; Kozák, Jiří (referee) ; Rudolf, Pavel (advisor)
Document type: Master’s theses
Year: 2018
Language: slo
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Abstract: [slo] [eng]
Práca sa zaoberá experimentálnym meraním charakteristík kavitujúceho prúdenia piatimi clonami s rôznym počtom a geometrickým usporiadaním otvorov pri dodržaní konštantnej prietočnej plochy. Dynamické charakteristiky: amplitúdy tlaku a dominantné frekvencie v závislosti na kavitačnom čísle, sú stanovené pre všetky režimy kavitačného prúdenia: počiatočnú kavitáciu, čiastočnú kavitáciu, plno vyvinutú kavitáciu a superkavitáciu. Pre stanovenie dominantných frekvencií sú použité tlakové snímače v dvoch režimoch merania. Výsledné frekvenčné spektrá sú validované obrazovou analýzou záznamov z vysokorýchlostnej kamery. Cavitating flow through five perforated plates with different number of holes with preserved constant flow cross-section area in sum were experimentally examined. Dynamic characteristics such as dependence of pressure amplitudes and dominant frequencies on cavitation number in all regimes of cavitating flow: incipient cavitation, partial cavitation, fully developed cavitation and supercavitation are obtained. For determination of dominant frequencies several pressure transducers in two regimes of measurement were used. Results were validated with frequency spectra obtained from picture analysis based on high-speed camera records.
Keywords: cavitation plates; dominant frequencies; Fourier transform; hydrodynamic cavitation; picture analysis

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/82317

Permalink: http://www.nusl.cz/ntk/nusl-581948


The record appears in these collections:
Universities and colleges > Public universities > Brno University of Technology
Academic theses (ETDs) > Master’s theses