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"
}