Publication detail
Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions
JEDELSKÝ, J. JÍCHA, M.
Czech title
Nestability v effervescent sprejích: Nová metoda měření, vliv provozních podmínek
English title
Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions
Type
journal article in Web of Science
Language
en
Original abstract
A new evaluation method of unsteadiness of the spray generated by an effervescent atomizer is presented. The method is based on measurements of pressure fluctuations in the atomizer mixing chamber. Measurements, made under different atomizer operational conditions, show that the spray unsteadiness depends mainly on gas-to-liquid ratio (GLR). Decrease in GLR causes the spray to become more unsteady. The relation between atomizer internal two-phase flow pattern and the spray unsteadiness is elucidated by visualization of the internal two-phase flow using a digital camera and the use of published two-phase flow maps. Findings of the new method are complemented and confronted with the results obtained by the use of the spray unsteadiness evaluation method of Edwards and Marx.
Czech abstract
V příspěvku je odvozena nová metoda měření nestabilit spreje u trysky typu effervescent. Metoda je založena na měření tlakových pulzací ve směšovací komoře trysky. Měření na modelové trysce ukazují vliv provozních podmínek: tlaku a směšovacího poměru plynu a kapaliny. K osvětlení příčin nestabilit je využita vizualizace vnitřního dvoufázového toku pomocí vysokorychlostní kamery. Výsledky měření nestabilit pomocí uvedené metody jsou porovnány s metodou odvozenou Edwardsem and Marxem.
English abstract
A new evaluation method of unsteadiness of the spray generated by an effervescent atomizer is presented. The method is based on measurements of pressure fluctuations in the atomizer mixing chamber. Measurements, made under different atomizer operational conditions, show that the spray unsteadiness depends mainly on gas-to-liquid ratio (GLR). Decrease in GLR causes the spray to become more unsteady. The relation between atomizer internal two-phase flow pattern and the spray unsteadiness is elucidated by visualization of the internal two-phase flow using a digital camera and the use of published two-phase flow maps. Findings of the new method are complemented and confronted with the results obtained by the use of the spray unsteadiness evaluation method of Edwards and Marx.
Keywords in Czech
Nestability spreje, effervescent tryska, metoda měření, dvoufázový tok
Keywords in English
Spray unsteadiness, effervescent atomizer, measurement method, two-phase flow
RIV year
2008
Released
01.01.2008
Publisher
Begell House
Location
Begell House Inc. 50 Cross Highway, Redding, CT 06896
ISSN
1044-5110
Journal
Atomization and sprays
Volume
18
Number
1
Pages from–to
49–83
Pages count
35
BIBTEX
@article{BUT44240,
author="Jan {Jedelský} and Miroslav {Jícha},
title="Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions",
journal="Atomization and sprays",
year="2008",
volume="18",
number="1",
month="January",
pages="49--83",
publisher="Begell House",
address="Begell House Inc.
50 Cross Highway,
Redding, CT 06896",
issn="1044-5110"
}