An Experimental Analysis of the Droplets Charging in the Wind Tunnel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00353601" target="_blank" >RIV/68407700:21220/22:00353601 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/epjconf/202226401002" target="_blank" >https://doi.org/10.1051/epjconf/202226401002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/202226401002" target="_blank" >10.1051/epjconf/202226401002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

An Experimental Analysis of the Droplets Charging in the Wind Tunnel

Popis výsledku v původním jazyce

An aim of this paper is introduce an experimental analysis the droplets electrostatic charge on the two different surfaces. The atomization of the droplets from the liquid film at high speed is still not satisfactory understand. The phenomena can be found in the steam turbines and other technical applications. The liquid film atomization is connected with the electrostatic charge of the formed droplets. The paper describes the experiment when the coated and non-coated surfaces were tested for estimation of the droplet size distribution function and the droplets charge. A new wind tunnel was developed for the study of the liquid film atomization for similar conditions in steam turbines. The coarse droplets are formed from the liquid films on the blades and inner casings. The coarse droplets formed on the non-moving blades don´t exactly follow the bulk flow and they collide with moving blades. These collisions cause erosion and corrosion processes which have an unfavourable effect on the reliability and the efficiency of steam turbines. The tunnel is equipped with the standard instrumentation for the measurement of the flow properties and for the analysis of the size distribution function of the droplets. Two measurements methods were used for the measurement of the size of the droplets, photogrammetry and light scattering. The first tested surface is polished stainless steel and second is the electrical isolating and ydrophobic coating. The esults from the measurement suggest the possibility of the better understanding of the erosion processes in the steam turbines.

Název v anglickém jazyce

An Experimental Analysis of the Droplets Charging in the Wind Tunnel

Popis výsledku anglicky

An aim of this paper is introduce an experimental analysis the droplets electrostatic charge on the two different surfaces. The atomization of the droplets from the liquid film at high speed is still not satisfactory understand. The phenomena can be found in the steam turbines and other technical applications. The liquid film atomization is connected with the electrostatic charge of the formed droplets. The paper describes the experiment when the coated and non-coated surfaces were tested for estimation of the droplet size distribution function and the droplets charge. A new wind tunnel was developed for the study of the liquid film atomization for similar conditions in steam turbines. The coarse droplets are formed from the liquid films on the blades and inner casings. The coarse droplets formed on the non-moving blades don´t exactly follow the bulk flow and they collide with moving blades. These collisions cause erosion and corrosion processes which have an unfavourable effect on the reliability and the efficiency of steam turbines. The tunnel is equipped with the standard instrumentation for the measurement of the flow properties and for the analysis of the size distribution function of the droplets. Two measurements methods were used for the measurement of the size of the droplets, photogrammetry and light scattering. The first tested surface is polished stainless steel and second is the electrical isolating and ydrophobic coating. The esults from the measurement suggest the possibility of the better understanding of the erosion processes in the steam turbines.

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

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

EPJ Web of Conferences

ISBN

—

ISSN

2100-014X

e-ISSN

2100-014X

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

EPJ Web of Conferences

Místo vydání

Les Ulis Cedex A

Místo konání akce

Liberec

Datum konání akce

23. 11. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—