An Experimental Analysis of the Droplets Charging in the Wind Tunnel

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

An Experimental Analysis of the Droplets Charging in the Wind Tunnel

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TN01000007" target="_blank" >TN01000007: National Centre for Energy</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Article name in the collection

EPJ Web of Conferences

ISBN

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ISSN

2100-014X

e-ISSN

2100-014X

Number of pages

4

Pages from-to

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Publisher name

EPJ Web of Conferences

Place of publication

Les Ulis Cedex A

Event location

Liberec

Event date

Nov 23, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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