Publication detail
Analysis of effervescent spray quality for oil-fired furnace application
HÁJEK, J. DOHNAL, M. VONDÁL, J. BROUKAL, J.
Czech title
Analýza kvality šumivého spreje pro použití v kapalinových hořácích ohřevných pecí
English title
Analysis of effervescent spray quality for oil-fired furnace application
Type
journal article in Web of Science
Language
en
Original abstract
The quality of liquid fuel atomization is a key factor in the formation of gaseous pollutants and particulate emissions. This paper investigates the quality of effervescent spray, which has established itself as a promising alternative to conventional spray formation mechanisms. The reported results were obtained using a dual-phase Doppler analyser. Droplet data were collected in multiple locations varying both axially and radially, in intermediate spray region. The results display spatial development of Sauter mean diameter (SMD) in effervescent sprays at different operating conditions, but they also show that SMD may be insufficient to characterize the spray, especially near to the dense spray region. This conclusion is based on the observed large variance of drop size and velocity and on their mutual correlation. It is concluded that for modelling purposes, joint distributions of drop size and velocity would be more appropriate to fully characterize the primary atomization in an effervescent spray.
Czech abstract
Kvalita atomizace kapalného paliva je klíčovým faktorem při vzniku plynných a tuhých znečišťujících látek. Tento článek zkoumá kvalitu šumivého spreje, který se etabloval jako slibná alternativa k běžným mechanismům tvorby spreje. Uváděné výsledky byly získány za použití duálního fázového Dopplerovského analyzátoru. Údaje o kapkách byly shromážděny v různých místech axiálně i radiálně, v přechodné oblasti spreje. Výsledky zobrazují prostorový vývoj Sauterova středního průměru (SMD) v šumivých sprejích při různých provozních podmínkách, ale také ukazují, že SMD může být nedostatečný pro charakterizaci spreje, a to zejména v blízkosti husté oblasti spreje. Tento závěr je založen na pozorování velkého rozptylu velikosti kapek a rychlosti, a na jejich vzájemné korelaci. Z toho plyne, že pro účely modelování je vhodnější sdružené rozložení velikosti kapek a jejich rychlosti, aby plně charakterizovaly primární atomizaci v šumivých sprejích.
English abstract
The quality of liquid fuel atomization is a key factor in the formation of gaseous pollutants and particulate emissions. This paper investigates the quality of effervescent spray, which has established itself as a promising alternative to conventional spray formation mechanisms. The reported results were obtained using a dual-phase Doppler analyser. Droplet data were collected in multiple locations varying both axially and radially, in intermediate spray region. The results display spatial development of Sauter mean diameter (SMD) in effervescent sprays at different operating conditions, but they also show that SMD may be insufficient to characterize the spray, especially near to the dense spray region. This conclusion is based on the observed large variance of drop size and velocity and on their mutual correlation. It is concluded that for modelling purposes, joint distributions of drop size and velocity would be more appropriate to fully characterize the primary atomization in an effervescent spray.
Keywords in English
Effervescent spray; Dual-phase Doppler anemometry; Drop size and velocity joint distributions; Axial and radial droplet velocity distributions; Visualization
RIV year
2015
Released
20.02.2015
Publisher
Springer-Verlag
Location
Berlin Heidelberg
ISSN
1618-954X
Volume
17
Number
5
Pages from–to
1195–1205
Pages count
11
BIBTEX
@article{BUT113006,
author="Jiří {Hájek} and Miloslav {Dohnal} and Jiří {Vondál} and Jakub {Broukal},
title="Analysis of effervescent spray quality for oil-fired furnace application",
year="2015",
volume="17",
number="5",
month="February",
pages="1195--1205",
publisher="Springer-Verlag",
address="Berlin Heidelberg",
issn="1618-954X"
}