Publication detail
Optimization of Pressure-Swirl Atomizer for a Burner Retrofit
JEDELSKÝ, J. JÍCHA, M.
Original Title
Optimization of Pressure-Swirl Atomizer for a Burner Retrofit
English Title
Optimization of Pressure-Swirl Atomizer for a Burner Retrofit
Type
abstract
Language
en
Original Abstract
This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads. Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA. The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.
English abstract
This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads. Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA. The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.
Keywords
Design optimization, Pressure-Swirl Atomizer, Burner Retrofit
Released
02.09.2013
Publisher
Mediterranean Agronomic Institute of Chania
Location
Chania, Greece
Pages from
1
Pages to
8
Pages count
8
Documents
BibTex
@misc{BUT104264,
author="Jan {Jedelský} and Miroslav {Jícha}",
title="Optimization of Pressure-Swirl Atomizer for a Burner Retrofit",
annote="This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads.
Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA.
The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.",
address="Mediterranean Agronomic Institute of Chania",
booktitle="Proceedings of the 25th European Conference on Liquid Atomization and Spray Systems.",
chapter="104264",
howpublished="electronic, physical medium",
institution="Mediterranean Agronomic Institute of Chania",
year="2013",
month="september",
pages="1--8",
publisher="Mediterranean Agronomic Institute of Chania",
type="abstract"
}