Flow analysis in a steam turbine control valve with through-flow valve chamber
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F21%3A43961736" target="_blank" >RIV/49777513:23210/21:43961736 - isvavai.cz</a>
Result on the web
<a href="https://nanoengineeringmedical.asmedigitalcollection.asme.org/nuclearengineering/article-abstract/7/2/021401/1090567/Flow-Analysis-in-a-Steam-Turbine-Control-Valve?redirectedFrom=fulltext" target="_blank" >https://nanoengineeringmedical.asmedigitalcollection.asme.org/nuclearengineering/article-abstract/7/2/021401/1090567/Flow-Analysis-in-a-Steam-Turbine-Control-Valve?redirectedFrom=fulltext</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/1.4049055" target="_blank" >10.1115/1.4049055</a>
Alternative languages
Result language
angličtina
Original language name
Flow analysis in a steam turbine control valve with through-flow valve chamber
Original language description
A nuclear power plant also includes a secondary cycle, which main component is a steam turbine. The steam turbine processes the thermal and pressure energy of steam and converts it into mechanical energy. Reliable and safe operation of the steam turbine, thus of the entire block, is ensured by valves. The flow in a pair of control valves, where the steam flows through the valve chamber past the first valve to the second valve, is investigated in this paper. The experimentally determined flow characteristics of both valves were evaluated and results were generalized. The experiments were carried out in the Aerodynamic laboratory of the Institute of Thermomechanics of the Czech Academy of Sciences in Novy Knin where a wind tunnel for high speeds could be used. Data of the distribution of pressures in selected places were evaluated. The energy loss in the valves was compared with the loss in a separate diffuser with varying degrees of expansion. The influence of a valve strainer, which is a part situated upstream of the control valve cone, was also investigated. It was found out in which case and where there is a significant disturbance of the velocity flow field. The first valve in the chamber is more sensitive to pressure losses in contrast to the second valve which is comparable to an ideal design of the diffuser, which indicates that this part of the valve assembly is optimal. Regarding the strainers, it was found out that the strainer helps to balance the velocity ratios at the inlet to the valve which has a positive effect on reducing the total energy pressure loss. As a result, the loss in the first valve can be significantly reduced which helps to increase the efficiency of the whole turbine.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
<a href="/en/project/LQ1603" target="_blank" >LQ1603: Research for SUSEN</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Nuclear Engineering and Radiation Science
ISSN
2332-8983
e-ISSN
—
Volume of the periodical
7
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
021404-1 - 021404-7
UT code for WoS article
000630005800031
EID of the result in the Scopus database
2-s2.0-85101310981