Detail publikace
Výzkum spreje generovaného tlakovou vířivou tryskou pomocí PIV
ĎURDINA, L. JEDELSKÝ, J. JÍCHA, M.
Český název
Výzkum spreje generovaného tlakovou vířivou tryskou pomocí PIV
Anglický název
PIV Investigation of a Pressure-Swirl Atomizer Spray
Typ
článek v časopise - ostatní, Jost
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 česky
Particle Image Velocimetry, PIV, stereoscopické PIV, atomizace, sprej, rychlostní pole
Klíčová slova anglicky
Particle Image Velocimetry, PIV, stereoscopic PIV, atomization, spray, flow field
Rok RIV
2013
Vydáno
20.12.2013
Nakladatel
Association for Engineering Mechanics
Místo
Brno
ISSN
1802-1484
Ročník
20 (2013)
Číslo
6
Strany od–do
459–469
Počet stran
11
BIBTEX
@article{BUT107153,
author="Lukáš {Ďurdina} and Jan {Jedelský} and Miroslav {Jícha},
title="PIV Investigation of a Pressure-Swirl Atomizer Spray",
year="2013",
volume="20 (2013)",
number="6",
month="December",
pages="459--469",
publisher="Association for Engineering Mechanics",
address="Brno",
issn="1802-1484"
}