Detail publikace
Některé aspekty rozpadu kapalinové stěny v tlakových vířivých sprejích
JEDELSKÝ, J. MALÝ, M. HOLUB, M. JÍCHA, M.
Český název
Některé aspekty rozpadu kapalinové stěny v tlakových vířivých sprejích
Anglický název
SOME ASPECTS OF DISINTEGRATION OF ANNULAR LIQUID SHEET IN PRESSURE-SWIRL ATOMIZATION
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
In pressure-swirl (PS) atomization, the internal flow structure and the formation of a liquid film are closely linked to the quality of the resulting spray. The flow, as a subject to several disturbing sources, contain unsteadiness that can harm the atomization.In this paper, imaging is used to study discharge, near nozzle flow and primary breakup for small PS atomizer. The atomizer performance is characterised in terms of discharge coefficient, liquid sheet thickness, breakup distance, and nozzle efficiency. The breakup length according to near nozzle visualization and sheet breakup analysis wasfound much smaller than the length predicted using the inviscid model and both external and internal sources were identified as possible reasons. External flow instability sources were found by means of pressure fluctuation sensing upstream the nozzle. Phase-Doppler anemometry was used to document the mean structure of the developed spray and to characterise spray fluctuations. The findings are used to propose possible changes in the atomizer design for improvement of its performance.
Český abstrakt
Cílem této publikace je odhalit některé aspekty rozpadu kapalinové stěny v tlakových vířivých sprejích. Více info v anglickém abstraktu.
Anglický abstrakt
In pressure-swirl (PS) atomization, the internal flow structure and the formation of a liquid film are closely linked to the quality of the resulting spray. The flow, as a subject to several disturbing sources, contain unsteadiness that can harm the atomization.In this paper, imaging is used to study discharge, near nozzle flow and primary breakup for small PS atomizer. The atomizer performance is characterised in terms of discharge coefficient, liquid sheet thickness, breakup distance, and nozzle efficiency. The breakup length according to near nozzle visualization and sheet breakup analysis wasfound much smaller than the length predicted using the inviscid model and both external and internal sources were identified as possible reasons. External flow instability sources were found by means of pressure fluctuation sensing upstream the nozzle. Phase-Doppler anemometry was used to document the mean structure of the developed spray and to characterise spray fluctuations. The findings are used to propose possible changes in the atomizer design for improvement of its performance.
Klíčová slova česky
Nestability, kapalinová stěna, tlaková vířivá tryska, primární atomizace
Klíčová slova anglicky
unsteadiness, liquid sheet, pressure-swirl atomizer, primary breakup
Rok RIV
2015
Vydáno
01.09.2015
Místo
Budapest
ISBN
978-963-313-190-9
Kniha
Conference on Modelling Fluid Flow
Strany od–do
1–8
Počet stran
8
BIBTEX
@inproceedings{BUT117106,
author="Jan {Jedelský} and Milan {Malý} and Martin {Holub} and Miroslav {Jícha},
title="SOME ASPECTS OF DISINTEGRATION OF ANNULAR LIQUID SHEET IN PRESSURE-SWIRL ATOMIZATION",
booktitle="Conference on Modelling Fluid Flow",
year="2015",
month="September",
pages="1--8",
address="Budapest",
isbn="978-963-313-190-9"
}