Nestability sprejů typu effervescent, porovnání dvou měřících metod a vliv provozních podmínek

Kód výsledku v IS VaVaI

RIV/00216305:26210/05:PU53427 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Unsteadiness in Effervescent Sprays, A Comparison of Two Measurement Methods and the Influence of Operation Conditions

Popis výsledku v původním jazyce

Two different methods were used to quantify the unsteadiness of effervescent atomizer generated spray in relation to operational conditions, two-phase flow pattern inside the atomizer mixing chamber and position in spray. The first method is based on measurement of pressure fluctuations in atomizer mixing chamber. This novel method was derived and applied here. Results show that decrease in GLR causes the nozzle to become more unsteady. Steady behaviour under dispersed and annular internal flow and tenddency to unsteadiness when the flow shifts from frothy to bubbly can be seen on the two-phase flow maps. The second method, developed by Edvard and Marx, uses a comparison of measured interparticle arrival time distribution with theoretical distributionfunction modelled as inhomogeneous Poisson process. Not fully identical results with those in previous case in relation to the atomizer operation conditions show the spray unsteadiness development after discharge. Spray is more unsteady at

Název v anglickém jazyce

Unsteadiness in Effervescent Sprays, A Comparison of Two Measurement Methods and the Influence of Operation Conditions

Popis výsledku anglicky

Two different methods were used to quantify the unsteadiness of effervescent atomizer generated spray in relation to operational conditions, two-phase flow pattern inside the atomizer mixing chamber and position in spray. The first method is based on measurement of pressure fluctuations in atomizer mixing chamber. This novel method was derived and applied here. Results show that decrease in GLR causes the nozzle to become more unsteady. Steady behaviour under dispersed and annular internal flow and tenddency to unsteadiness when the flow shifts from frothy to bubbly can be seen on the two-phase flow maps. The second method, developed by Edvard and Marx, uses a comparison of measured interparticle arrival time distribution with theoretical distributionfunction modelled as inhomogeneous Poisson process. Not fully identical results with those in previous case in relation to the atomizer operation conditions show the spray unsteadiness development after discharge. Spray is more unsteady at

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

GP101/03/P020: Experimentální výzkum nestabilit sprejů generovaných effervescent tryskami

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2005

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of International Symposium on Heat and Mass Transfer in Spray Systems

ISBN

1-56700-223-4

ISSN

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e-ISSN

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Počet stran výsledku

3

Strana od-do

55-57

Název nakladatele

International Centre for Heat and Mass Transfer

Místo vydání

Ankara, Turkey

Místo konání akce

Antalya, Turkey

Datum konání akce

5. 6. 2005

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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