Publication detail
Methods of Experimental Investigation of Cavitation in a Convergent - Divergent Nozzle of Rectangular Cross Section
JABLONSKÁ, J. KOZUBKOVÁ, M. HIMR, D. WEISZ, M.
Czech title
Metody experimentálního vyšetřování kavitace v konvergentní-divergentní dýze obdélníkového průřezu
English title
Methods of Experimental Investigation of Cavitation in a Convergent - Divergent Nozzle of Rectangular Cross Section
Type
journal article in Web of Science
Language
en
Original abstract
Cavitation is a phenomenon with both positive and negative effects and with dynamic manifestations in hydraulic, food, chemical and other machinery. This article deals with the detection and dynamic behavior of cavitation clouds in water flows through a rectangular cross-section convergent-divergent nozzle. Cavitation was measured by methods applicable in engineering practice. Pressure, flow rate, noise, vibration, and amount of air dissolved in the liquid were measured and cavitation region was recorded with a high-speed camera. Evaluation of acquired images in connection with measured pressure pulsations and mechanical vibrations was performed with the use of the FFT method. In certain cases, dimensionless parameters were used to generalize the measurements. The results will be used to specify multiphase mathematical cavitation model parameters.
Czech abstract
Kavitace je jev s pozitivními i negativními účinky v hydraulickém, potravinářském, chemickém a dalším průmyslu. Tento článek je zaměřen na detekci a dynamické vlastnosti kavitačního mraku ve vodě proudící skrz obdélníkovou konvergentní-divergentní dýzu. Kavitace byla měřena metodami aplikovatelnými v praxi. Tlak, průtok, hluk, vibrace a množství rozpuštěného vzduchu ve vodě byly měřeny splečně s obrazovým zaznamenávání kavitačního mraku pomocí vysokorychlostní kamery. Nasbírané snímky byly vyhodnoceny synchronně s měřením tlakových a mechanických pulzací pomocí metody FFT. Výsledky byly přepočteny na bezrozměrné veličiny a budou využit pro specifikaci parametrů matematického modelu kavitace.
English abstract
Cavitation is a phenomenon with both positive and negative effects and with dynamic manifestations in hydraulic, food, chemical and other machinery. This article deals with the detection and dynamic behavior of cavitation clouds in water flows through a rectangular cross-section convergent-divergent nozzle. Cavitation was measured by methods applicable in engineering practice. Pressure, flow rate, noise, vibration, and amount of air dissolved in the liquid were measured and cavitation region was recorded with a high-speed camera. Evaluation of acquired images in connection with measured pressure pulsations and mechanical vibrations was performed with the use of the FFT method. In certain cases, dimensionless parameters were used to generalize the measurements. The results will be used to specify multiphase mathematical cavitation model parameters.
Keywords in Czech
Kavitace;diagnostika;experiment;bezrozměrná analýza;vyhodnocení
Keywords in English
Cavitation;diagnostics;experiment;dimensionless analysis;evaluation
Released
01.08.2016
Publisher
De Gruyter Open
ISSN
1335-8871
Volume
16
Number
4
Pages from–to
197–204
Pages count
8
BIBTEX
@article{BUT171164,
author="Jana {Jablonská} and Milada {Kozubková} and Daniel {Himr} and Michal {Weisz},
title="Methods of Experimental Investigation of Cavitation in a Convergent – Divergent Nozzle of Rectangular Cross Section",
year="2016",
volume="16",
number="4",
month="August",
pages="197--204",
publisher="De Gruyter Open",
issn="1335-8871"
}