Publication detail
Investigation and comparison of spray characteristics of pressure-swirl atomizers for a small-sized aircraft turbine engine
ĎURDINA, L. JEDELSKÝ, J. JÍCHA, M.
Czech title
Výzkum a porovnání vlastností spreje tlakových vířivých trysek pro malý letecký turbomotor
English title
Investigation and comparison of spray characteristics of pressure-swirl atomizers for a small-sized aircraft turbine engine
Type
journal article in Web of Science
Language
en
Original abstract
The quality of liquid fuel atomization highly affects the formation of gaseous pollutants and particulate matter emissions from combustion processes. Spray characteristics of two geometrically different pressure-swirl atom-izers for a turbojet engine in light aircraft were measured on a cold test bench. A spill-return atomizer and its intended replacement simplex atomizer were investigated using Particle Image Velocimetry (PIV) and Phase-Doppler Anemometry (PDA). Single-camera and stereoscopic PIV measurements yielded velocity distributions in the axial cross-section of the spray cone. PDA measurements provided dropsize distribution and axial velocity data. Acquired results reveal significant differences in spray characteristics of the nozzles investigated at the same fuel injection pressures. The simplex nozzle produced spray with Sauter mean diameters lower by 5–20 um depending on the regime, its spray was more stable but its shape greatly varied with fuel injection pressure. These differences are discussed in detail, their analysis indicate a potential for spray improvement provided by the novel atomizer design and elucidates the possible impact of the nozzle replacement on the combustion process.
Czech abstract
Příspěvek popisuje porovnání vlastností spreje dvou tlakových vířivých trysek pro malý letecký turbomotor. Sprej je zkoumán pomocí metod PIV (particle image velocimetry) a PDA (phase-Doppler anemometry) a předmětem je rychlostní pole ve spreji, rozložení kapaliny ve spreji a velikost kapek.
English abstract
The quality of liquid fuel atomization highly affects the formation of gaseous pollutants and particulate matter emissions from combustion processes. Spray characteristics of two geometrically different pressure-swirl atom-izers for a turbojet engine in light aircraft were measured on a cold test bench. A spill-return atomizer and its intended replacement simplex atomizer were investigated using Particle Image Velocimetry (PIV) and Phase-Doppler Anemometry (PDA). Single-camera and stereoscopic PIV measurements yielded velocity distributions in the axial cross-section of the spray cone. PDA measurements provided dropsize distribution and axial velocity data. Acquired results reveal significant differences in spray characteristics of the nozzles investigated at the same fuel injection pressures. The simplex nozzle produced spray with Sauter mean diameters lower by 5–20 um depending on the regime, its spray was more stable but its shape greatly varied with fuel injection pressure. These differences are discussed in detail, their analysis indicate a potential for spray improvement provided by the novel atomizer design and elucidates the possible impact of the nozzle replacement on the combustion process.
Keywords in Czech
sprej, tlaková vířivá tryska, PIV, PDA, particle image velocimetry; phase-Doppler anemometry; velikost kapek
Keywords in English
spray characteristics; pressure-swirl atomizer; particle image velocimetry; phase-Doppler anemometry; spill-return; droplet size, PIV, PDA
RIV year
2014
Released
08.08.2014
Publisher
Elsevier
Location
The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England
ISSN
0017-9310
Volume
78
Number
11
Pages from–to
892–900
Pages count
9
BIBTEX
@article{BUT108734,
author="Lukáš {Ďurdina} and Jan {Jedelský} and Miroslav {Jícha},
title="Investigation and comparison of spray characteristics of pressure-swirl atomizers for a small-sized aircraft turbine engine",
year="2014",
volume="78",
number="11",
month="August",
pages="892--900",
publisher="Elsevier",
address="The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England",
issn="0017-9310"
}