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.

Original Title

Investigation and comparison of spray characteristics of pressure-swirl atomizers for a small-sized aircraft turbine engine

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.

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

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

Pages from

892

Pages to

900

Pages count

9

URL

Full text in the Digital Library

Documents

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",
  annote="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.",
  address="Elsevier",
  chapter="108734",
  doi="10.1016/j.ijheatmasstransfer.2014.07.066",
  institution="Elsevier",
  number="11",
  volume="78",
  year="2014",
  month="august",
  pages="892--900",
  publisher="Elsevier",
  type="journal article in Web of Science"
}