An experimental study of the coarse droplets formation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00335727" target="_blank" >RIV/68407700:21220/19:00335727 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/1.5138614" target="_blank" >https://doi.org/10.1063/1.5138614</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5138614" target="_blank" >10.1063/1.5138614</a>

Jazyk výsledku

angličtina

Název v původním jazyce

An experimental study of the coarse droplets formation

Popis výsledku v původním jazyce

An aim of this paper is introduce semi-experimental approach for a determination of the Weber number in the transonic wind tunnel for the liquid film atomization on the aerofoil. The wind tunnel was built for the study of the water droplets atomization from the liquid films at the high speed flow similar with one can find in the steam turbines. The coarse droplets in steam turbines are formed from the liquid films on the blades and casing, mostly in their low pressure parts. The wind tunnel is equipped with common instrumentation for the measurement of the flow properties. In this paper the numerical simulation is applied for the study of the flow field in the wind tunnel nozzle, especially in the vicinity of the aerofoil. The numerical simulation was fitted with the pressure measurement of the static and dynamics pressures on the wind tunnel. The results from the simulation in vicinity of the aerofoil are used for the precise determination of the conditions of the liquid film break-up. Two measurements methods were used for the measurement of the size of the droplets, the photogrammetry and the light scattering. Together, the information about the size distribution function of the formed droplets and the detailed knowledge of the flow field allow the determination of the mean values of the Weber number for groups of the formed droplets.

Název v anglickém jazyce

An experimental study of the coarse droplets formation

Popis výsledku anglicky

An aim of this paper is introduce semi-experimental approach for a determination of the Weber number in the transonic wind tunnel for the liquid film atomization on the aerofoil. The wind tunnel was built for the study of the water droplets atomization from the liquid films at the high speed flow similar with one can find in the steam turbines. The coarse droplets in steam turbines are formed from the liquid films on the blades and casing, mostly in their low pressure parts. The wind tunnel is equipped with common instrumentation for the measurement of the flow properties. In this paper the numerical simulation is applied for the study of the flow field in the wind tunnel nozzle, especially in the vicinity of the aerofoil. The numerical simulation was fitted with the pressure measurement of the static and dynamics pressures on the wind tunnel. The results from the simulation in vicinity of the aerofoil are used for the precise determination of the conditions of the liquid film break-up. Two measurements methods were used for the measurement of the size of the droplets, the photogrammetry and the light scattering. Together, the information about the size distribution function of the formed droplets and the detailed knowledge of the flow field allow the determination of the mean values of the Weber number for groups of the formed droplets.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TN01000007" target="_blank" >TN01000007: Národní centrum pro energetiku</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1936-0

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Plzeň

Datum konání akce

11. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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