Publication detail
STUDY OF AMBIENT TURBULENCE EFFECTS ON DIESEL SPRAYS IN A FAN-STIRRED VESSEL
JAKUBÍK, T. LAWES, M. WOOLLEY, R. JÍCHA, M.
Czech title
Výzkum vlivu okolní turbulence na sprej naftového motoru ve vířivé komoře
English title
STUDY OF AMBIENT TURBULENCE EFFECTS ON DIESEL SPRAYS IN A FAN-STIRRED VESSEL
Type
journal article in Web of Science
Language
en
Original abstract
This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.
Czech abstract
This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.
English abstract
This study investigates the influence of the ambient turbulence on a pressure atomized diesel-like spray in the well characterized and controlled turbulence flow field of a fan-stirred experimental vessel. Injections were performed into nitrogen at 15 bar and 400 K under four turbulent conditions with RMS velocities ranging from 0.5 up to 5.5 m/s. Mie-scatter laser sheet and Schlieren techniques were applied to visualize the liquid and the vapor phase of the spray. With increasing turbulence there was increasing formation of droplet clusters and ligaments which resulted in a reduced detection of droplet vapor along the whole penetration length of the spray. From considerations of the Stokes numbers for the droplet-turbulence interaction, it is concluded that the micro length scales of the ambient turbulence were the probable source of this droplet clustering.
Keywords in English
diesel spray, turbulence, droplet clustering, cfd, droplet-turbulence interaction
RIV year
2006
Released
01.11.2006
Publisher
Begell House
Location
50 Cross highway, Redding, CT 06896
ISSN
1044-5110
Journal
Atomization and sprays
Volume
16
Number
6
Pages from–to
687–703
Pages count
17
BIBTEX
@article{BUT43502,
author="Tomáš {Jakubík} and Malcolm {Lawes} and Robert {woolley} and Miroslav {Jícha},
title="STUDY OF AMBIENT TURBULENCE EFFECTS ON DIESEL SPRAYS IN A FAN-STIRRED VESSEL",
journal="Atomization and sprays",
year="2006",
volume="16",
number="6",
month="November",
pages="687--703",
publisher="Begell House",
address="50 Cross highway, Redding, CT 06896",
issn="1044-5110"
}