Publication detail

Experimental investigation of pressure-swirl atomizers with a modification in a geometry of spill-return orifice

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

Original Title

Experimental investigation of pressure-swirl atomizers with a modification in a geometry of spill-return orifice

English Title

Experimental investigation of pressure-swirl atomizers with a modification in a geometry of spill-return orifice

Type

conference paper

Language

en

Original Abstract

This study investigates characteristics of spray generated by a pressure swirl atomizer (spill-return type) which is designed for a small-sized jet engine using shadowgraphy and Phase-Doppler Anemometry (PDA). The purpose of this study is to find out an influence of a spill-return orifice geometry on (an) atomization quality. Two different geometries of the spill-return orifice were tested in terms of spray stability on a cold test bench. The former atomizer uses the direct axial spill-return orifice located in a centre of a swirl chamber, whileere the modified atomizer contains an obstacle blocking axial flow through the spill-return orifice. PDA measurement yields drop-size distribution and velocity data, whileere the shadowgraphy unveils a break-up process in detail. Performed measurements reveals significant differences in spray characteristics as well as differences in spraybreak-up stability. Results of this study showleadsato necessity of more detailed investigation (in the area) of influences of spill-return orifice geometry on an atomization process.

English abstract

This study investigates characteristics of spray generated by a pressure swirl atomizer (spill-return type) which is designed for a small-sized jet engine using shadowgraphy and Phase-Doppler Anemometry (PDA). The purpose of this study is to find out an influence of a spill-return orifice geometry on (an) atomization quality. Two different geometries of the spill-return orifice were tested in terms of spray stability on a cold test bench. The former atomizer uses the direct axial spill-return orifice located in a centre of a swirl chamber, whileere the modified atomizer contains an obstacle blocking axial flow through the spill-return orifice. PDA measurement yields drop-size distribution and velocity data, whileere the shadowgraphy unveils a break-up process in detail. Performed measurements reveals significant differences in spray characteristics as well as differences in spraybreak-up stability. Results of this study showleadsato necessity of more detailed investigation (in the area) of influences of spill-return orifice geometry on an atomization process.

Keywords

Spill-return atomizer, Phase Doppler Anemometry, shadowgraphy, instabilities

RIV year

2015

Released

23.06.2015

Location

Litoměřice

ISBN

978-80-7414-912-2

Book

34th Conference of Departments of Fluids Mechanics and Thermomechanics Proceedings of Extended Abstracts

Edition

1

Pages from

1

Pages to

2

Pages count

2

BibTex


@inproceedings{BUT117073,
  author="Milan {Malý} and Lada {Janáčková} and Jan {Jedelský} and Miroslav {Jícha}",
  title="Experimental investigation of pressure-swirl atomizers with a modification in a geometry of spill-return orifice",
  annote="This study investigates characteristics of spray generated by a pressure swirl atomizer (spill-return type) which is designed for a small-sized jet engine using shadowgraphy and Phase-Doppler Anemometry (PDA). The purpose of this study is to find out an influence of a spill-return orifice geometry on (an) atomization quality. Two different geometries of the spill-return orifice were tested in terms of spray stability on a cold test bench. The former atomizer uses the direct axial spill-return orifice located in a centre of a swirl chamber, whileere the modified atomizer contains an obstacle blocking axial flow through the spill-return orifice. PDA measurement yields drop-size distribution and velocity data, whileere the shadowgraphy unveils a break-up process in detail. Performed measurements reveals significant differences in spray characteristics as well as differences in spraybreak-up stability. Results of this study showleadsato necessity of more detailed investigation (in the area) of influences of spill-return orifice geometry on an atomization process.",
  booktitle="34th Conference of Departments of Fluids Mechanics and Thermomechanics Proceedings of Extended Abstracts",
  chapter="117073",
  edition="1",
  howpublished="print",
  year="2015",
  month="june",
  pages="1--2",
  type="conference paper"
}