Publication detail
Droplet dynamics in sprays generated by four different twin-fluid atomizers
ZAREMBA, M. MALÝ, M. MLKVIK, M. JEDELSKÝ, J. JÍCHA, M.
Czech title
Dynamika kapek ve sprejích generovaných čtyřmi různými dvoumédiovými tryskami
English title
Droplet dynamics in sprays generated by four different twin-fluid atomizers
Type
conference paper
Language
en
Original abstract
The aim of this paper is to examine droplet motion with respect to the mechanism of the liquid breakup for four twin-fluid atomizers. A high-speed camera was used to evaluate the primary breakup. Time-dependent data of droplets in the spray were acquired by means of a phase-Doppler analyser (PDA). It is shown that there are demonstrable differences in droplet dynamics amongst all the atomizers. Moreover, the influence of the primary breakup on the dynamics of the spray is discussed in terms of the velocity fluctuations and the turbulence intensity. A correlation of the axial and radial velocity shows unexpected behaviour that was attributed to the mechanism of liquid breakup. Presented results also point to the interaction of the large droplets with the air.
Czech abstract
Cílem této práce je zkoumat pohyb kapek ve vztahu k mechanismu rozpadu kapaliny u čtyř dvoumédiových trysek. Vysokorychlostní kamera byla použita k zhodnocení primárního rozpadu kapaliny. Časově závislá data o kapkách ve sprejích byla získána pomocí fázového Dopplerovského analyzátoru (PDA). Bylo poukázáno na prokazatelné rozdíly mezi dynamikou kapek ve sprejích pro všechny trysky. Navíc vliv primárního rozpadu kapaliny na dynamiku spreje je diskutována ve vztahu k rychlostním fluktuacím a intenzity turbulence. Korelace axiaální a radiální složky rychlosti poukazuje na nečekané chování, které bylo přisouzeno právě specifickému mechanismu rozpadu kapaliny. Výsledky dále poukazují na interakci velkých kapek se vzduchem.
English abstract
The aim of this paper is to examine droplet motion with respect to the mechanism of the liquid breakup for four twin-fluid atomizers. A high-speed camera was used to evaluate the primary breakup. Time-dependent data of droplets in the spray were acquired by means of a phase-Doppler analyser (PDA). It is shown that there are demonstrable differences in droplet dynamics amongst all the atomizers. Moreover, the influence of the primary breakup on the dynamics of the spray is discussed in terms of the velocity fluctuations and the turbulence intensity. A correlation of the axial and radial velocity shows unexpected behaviour that was attributed to the mechanism of liquid breakup. Presented results also point to the interaction of the large droplets with the air.
Keywords in Czech
Dynamika kapek; primární rozpad; fázový Dopplerovský analyzátor
Keywords in English
Droplet dynamics; primary breakup; phase Doppler analyser
RIV year
2015
Released
15.09.2015
Publisher
Begel House Inc.
Location
Sarajevo, Bosna and Herzegovina
ISBN
978-1-56700-427-4
ISSN
2377-2816
Book
Turbulence, Heat and Mass Transfer 8
Volume
8
Number
1
Pages from–to
649–652
Pages count
942
BIBTEX
@inproceedings{BUT116808,
author="Matouš {Zaremba} and Milan {Malý} and Marek {Mlkvik} and Jan {Jedelský} and Miroslav {Jícha},
title="Droplet dynamics in sprays generated by four different twin-fluid atomizers",
booktitle="Turbulence, Heat and Mass Transfer 8",
year="2015",
volume="8",
number="1",
month="September",
pages="649--652",
publisher="Begel House Inc.",
address="Sarajevo, Bosna and Herzegovina",
isbn="978-1-56700-427-4",
issn="2377-2816"
}