Publication detail

The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer

MALÝ, M. JANÁČKOVÁ, L. JEDELSKÝ, J. JÍCHA, M.

Original Title

The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer

English Title

The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer

Type

conference paper

Language

en

Original Abstract

An experimental investigation of characteristics of spray generated by a pressure-swirl atomizer (spill-return type) was performed using shadowgraphy and Phase-Doppler Anemometry (PDA). Several different geometries of the spill-return orifice were tested in terms of a spray stability and quality on a cold test bench. PDA measurement yields a drop-size distribution and velocity data while the shadowgraphy unveils a break-up process in detail. Performed measurements reveal significant differences in spray characteristics as well as differences in spray stability. The results suggest that the air core, formed inside the swirl chamber, passes through the spill orifice, which causes instability of the inner flow. These instabilities lead to a chaotic state of sheet breakup resulting in shortening of breakup distance. Obtained findings are used to propose possible changes in the atomizer design for improvement of its performance.

English abstract

An experimental investigation of characteristics of spray generated by a pressure-swirl atomizer (spill-return type) was performed using shadowgraphy and Phase-Doppler Anemometry (PDA). Several different geometries of the spill-return orifice were tested in terms of a spray stability and quality on a cold test bench. PDA measurement yields a drop-size distribution and velocity data while the shadowgraphy unveils a break-up process in detail. Performed measurements reveal significant differences in spray characteristics as well as differences in spray stability. The results suggest that the air core, formed inside the swirl chamber, passes through the spill orifice, which causes instability of the inner flow. These instabilities lead to a chaotic state of sheet breakup resulting in shortening of breakup distance. Obtained findings are used to propose possible changes in the atomizer design for improvement of its performance.

Keywords

Spill-line, Pressure-swirl, Phase Doppler Anemometry,

Released

28.03.2016

Publisher

EDP Sciences

Pages from

1

Pages to

6

Pages count

6

URL

Full text in the Digital Library

BibTex


@inproceedings{BUT127916,
  author="Milan {Malý} and Lada {Janáčková} and Jan {Jedelský} and Miroslav {Jícha}",
  title="The influence of spill-line geometry on a spray generated by a pressure-swirl atomizer",
  annote="An experimental investigation of characteristics of spray generated by a pressure-swirl atomizer (spill-return type) was performed using shadowgraphy and Phase-Doppler Anemometry (PDA). Several different geometries of the spill-return orifice were tested in terms of a spray stability and quality on a cold test bench. PDA measurement yields a drop-size distribution and velocity data while the shadowgraphy unveils a break-up process in detail. Performed measurements reveal significant differences in spray characteristics as well as differences in spray stability. The results suggest that the air core, formed inside the swirl chamber, passes through the spill orifice, which causes instability of the inner flow. These instabilities lead to a chaotic state of sheet breakup resulting in shortening of breakup distance. Obtained findings are used to propose possible changes in the atomizer design for improvement of its performance.",
  address="EDP Sciences",
  booktitle="EPJ Web of Conferences",
  chapter="127916",
  doi="10.1051/epjconf/201611402070",
  howpublished="online",
  institution="EDP Sciences",
  number="2016",
  year="2016",
  month="march",
  pages="1--6",
  publisher="EDP Sciences",
  type="conference paper"
}