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.
Czech title
Experimentání test tlakové vířivé trysky s modifikací v geometrii obtokového otvoru
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.
Czech abstract
Tato práce se zabývá experimentáním studiem tlakové vířivé trysky s modifikací v geometrii obtokového otvoru za pooužití fázového dopplerovského analyzátoru.
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 in Czech
Tlaková vířivá trysky, nestability, Phase Doppler Anemometry, shadowgraphy,
Keywords in English
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
Pages from–to
1–2
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",
booktitle="34th Conference of Departments of Fluids Mechanics and Thermomechanics Proceedings of Extended Abstracts",
year="2015",
month="June",
pages="1--2",
address="Litoměřice",
isbn="978-80-7414-912-2"
}