Detail publikace

Výzkum spreje generovaného tlakovou vířivou tryskou pomocí PIV

ĎURDINA, L. JEDELSKÝ, J. JÍCHA, M.

Originální název

PIV Investigation of a Pressure-Swirl Atomizer Spray

Český název

Výzkum spreje generovaného tlakovou vířivou tryskou pomocí PIV

Anglický název

PIV Investigation of a Pressure-Swirl Atomizer Spray

Typ

článek v časopise

Jazyk

en

Originální abstrakt

Pressure-swirl atomizers are widely used in various combustion applications including aircraft jet engines. Spray characteristics, such as drop-size and velocity distribution have a principal influence on the combustion process. A number of studies have dealt with single-point laser diagnostic techniques, such as Phase-Doppler Anemometry, for spray measurements. An alternative approach is the use of a whole-field method - Particle Image Velocimetry (PIV). This contribution deals with investigation of spray characteristics of a spill-return pressure-swirl atomizer for a small-sized jet engine by means of PIV. The nozzle was operated on a cold test bench at atmospheric pressure and room temperature. Measurements were carried out in an axial section of the spray cone with various single-camera and stereoscopic PIV configurations. Results of our measurements provide a quantitative visualization of the spray flow fields in regimes based on the engine operating conditions. Comparison of velocity profiles obtained from the individual PIV configurations is presented and discussed. The pressure-swirl spray is recognised as an optically harsh environment for PIV due to large particle size range, high diameter–velocity correlations, strong velocity gradients and large velocity differences within an image, large variations in "seeding" concentration and out-of-plane particle movement.

Český abstrakt

Tlakové vířivé trysky jsou široce používány v různých aplikacích pro spalování včetně proudových leteckých motorů. Characteristiky spreje, jako rozložení velikosti a rychlosti kapek mají principiální dopad na spalovací proces. V tomto příspěvku je použita Particle Image Velocimetry (PIV) pro výzkum vlastností spreje generovaného tlakovou vířivou tryskou s obtokem.

Anglický abstrakt

Pressure-swirl atomizers are widely used in various combustion applications including aircraft jet engines. Spray characteristics, such as drop-size and velocity distribution have a principal influence on the combustion process. A number of studies have dealt with single-point laser diagnostic techniques, such as Phase-Doppler Anemometry, for spray measurements. An alternative approach is the use of a whole-field method - Particle Image Velocimetry (PIV). This contribution deals with investigation of spray characteristics of a spill-return pressure-swirl atomizer for a small-sized jet engine by means of PIV. The nozzle was operated on a cold test bench at atmospheric pressure and room temperature. Measurements were carried out in an axial section of the spray cone with various single-camera and stereoscopic PIV configurations. Results of our measurements provide a quantitative visualization of the spray flow fields in regimes based on the engine operating conditions. Comparison of velocity profiles obtained from the individual PIV configurations is presented and discussed. The pressure-swirl spray is recognised as an optically harsh environment for PIV due to large particle size range, high diameter–velocity correlations, strong velocity gradients and large velocity differences within an image, large variations in "seeding" concentration and out-of-plane particle movement.

Klíčová slova

Particle Image Velocimetry, PIV, stereoscopické PIV, atomizace, sprej, rychlostní pole

Rok RIV

2013

Vydáno

20.12.2013

Nakladatel

Association for Engineering Mechanics

Místo

Brno

Strany od

459

Strany do

469

Strany počet

11

BibTex


@article{BUT107153,
  author="Lukáš {Ďurdina} and Jan {Jedelský} and Miroslav {Jícha}",
  title="PIV Investigation of a Pressure-Swirl Atomizer Spray",
  annote="Pressure-swirl atomizers are widely used in various combustion applications including aircraft jet engines. Spray characteristics, such as drop-size and velocity distribution have a principal influence on the combustion process. A number of studies have dealt with single-point laser diagnostic techniques, such as Phase-Doppler Anemometry, for spray measurements. An alternative approach is the use of a whole-field method - Particle Image Velocimetry (PIV). This contribution deals with investigation of spray characteristics of a spill-return pressure-swirl atomizer for a small-sized jet engine by means of PIV. The nozzle was operated on a cold test bench at atmospheric pressure and room temperature. Measurements were carried out in an axial section of the spray cone with various single-camera and stereoscopic PIV configurations. Results of our measurements provide a quantitative visualization of the spray flow fields in regimes based on the engine operating conditions. Comparison of velocity profiles obtained from the individual PIV configurations is presented and discussed. The pressure-swirl spray is recognised as an optically harsh environment for PIV due to large particle size range, high diameter–velocity correlations, strong velocity gradients and large velocity differences within an image, large variations in "seeding" concentration and out-of-plane particle movement.",
  address="Association for Engineering Mechanics",
  chapter="107153",
  institution="Association for Engineering Mechanics",
  number="6",
  volume="20 (2013)",
  year="2013",
  month="december",
  pages="459--469",
  publisher="Association for Engineering Mechanics",
  type="journal article"
}