The Coarse Droplets Formation from the Water Condensate Film at Transonic Flow

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00378409" target="_blank" >RIV/68407700:21220/24:00378409 - isvavai.cz</a>

Výsledek na webu

<a href="https://ilasseurope.org/events/16th-iclass-2024-conference/" target="_blank" >https://ilasseurope.org/events/16th-iclass-2024-conference/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Coarse Droplets Formation from the Water Condensate Film at Transonic Flow

Popis výsledku v původním jazyce

This paper introduces an approximate determination of the biggest droplet formed from the liquid film on the blade in the steam turbine at a high-speed flow. This topic is important for a description of the droplets atomization process in the steam turbine or generally high speed (transonic) flow. In the current situation when the daily operation of steam turbines is not predictable due to the electricity supply from the photovoltaic and the wind power plants, the turbines work in the off-design conditions, the danger of the blade’s erosion caused by the coarse droplets is assumed. The experimental study was performed at the wind tunnel, which was developed mainly for the liquid film disruption simulations. The recent studies were focused mostly on the measurement or identification of the coarse droplets in the steam turbine, but the explanation of the formation process is still not sufficient. An analysis of the droplet`s diameter formed in the wind tunnel indicates, for the majority of the measurements, that one can find the rare droplets, bigger than the critical Weber number limit. This paper continues in previous work and extend the model for the compressible flow. A detailed hot wire measurement was performed in the vicinity of the blade’s trailing edge where the liquid film is disrupted to the coarse droplets. The analysis of the droplet’s movement in the wake of the blade was suggested to estimate droplet`s maximum size with respect the critical Weber number.

Název v anglickém jazyce

The Coarse Droplets Formation from the Water Condensate Film at Transonic Flow

Popis výsledku anglicky

This paper introduces an approximate determination of the biggest droplet formed from the liquid film on the blade in the steam turbine at a high-speed flow. This topic is important for a description of the droplets atomization process in the steam turbine or generally high speed (transonic) flow. In the current situation when the daily operation of steam turbines is not predictable due to the electricity supply from the photovoltaic and the wind power plants, the turbines work in the off-design conditions, the danger of the blade’s erosion caused by the coarse droplets is assumed. The experimental study was performed at the wind tunnel, which was developed mainly for the liquid film disruption simulations. The recent studies were focused mostly on the measurement or identification of the coarse droplets in the steam turbine, but the explanation of the formation process is still not sufficient. An analysis of the droplet`s diameter formed in the wind tunnel indicates, for the majority of the measurements, that one can find the rare droplets, bigger than the critical Weber number limit. This paper continues in previous work and extend the model for the compressible flow. A detailed hot wire measurement was performed in the vicinity of the blade’s trailing edge where the liquid film is disrupted to the coarse droplets. The analysis of the droplet’s movement in the wake of the blade was suggested to estimate droplet`s maximum size with respect the critical Weber number.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/GA22-28869S" target="_blank" >GA22-28869S: Vznik kapek při rychlých expanzích: přechodné případy mezi unární, binární a hetorogenní cestou</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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