Failure analysis of Rotating Blades of Low-pressure Steam Turbine Rotors and Possibility of Prediction Corrosion-fatigue Ruptures.MATEC Web of Conference 188. 04020 (2018) ICEAF-V 2018. https://doi.org/10.1051/matecconf/201818804020

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F18%3AN0000041" target="_blank" >RIV/47718684:_____/18:N0000041 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/matecconf/201818804020" target="_blank" >http://dx.doi.org/10.1051/matecconf/201818804020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/matecconf/201818804020" target="_blank" >10.1051/matecconf/201818804020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Failure analysis of Rotating Blades of Low-pressure Steam Turbine Rotors and Possibility of Prediction Corrosion-fatigue Ruptures.MATEC Web of Conference 188. 04020 (2018) ICEAF-V 2018. https://doi.org/10.1051/matecconf/201818804020

Popis výsledku v původním jazyce

Over the last few years, corrosion fatigue fractures initiating from corrosion pits have been a root cause of failures of rotating blades of the third stage of the low-pressure parts in several 200 MW turbines in ČEZ, a. s. power stations. This contribution deals with the analysis of several of these failures. Metallurgical investigation of the blades showed that the cause of the failures was the initiation and growth of a fatigue crack from a corrosion pit. ČEZ, a. s. has developed, based on the knowledge obtained by EPRI (Electric Power Research Institute), a methodology which can, in real conditions during checks of turbines, reliably detect the parameters of corrosion pits and predict the possibility of development of fatigue damage from detected pits. The process of methodology and its uncertainties (influence of filling of pits with oxides, cyclic stress calculations, and the selection of the geometric factor Y) are summarized.

Název v anglickém jazyce

Failure analysis of Rotating Blades of Low-pressure Steam Turbine Rotors and Possibility of Prediction Corrosion-fatigue Ruptures.MATEC Web of Conference 188. 04020 (2018) ICEAF-V 2018. https://doi.org/10.1051/matecconf/201818804020

Popis výsledku anglicky

Over the last few years, corrosion fatigue fractures initiating from corrosion pits have been a root cause of failures of rotating blades of the third stage of the low-pressure parts in several 200 MW turbines in ČEZ, a. s. power stations. This contribution deals with the analysis of several of these failures. Metallurgical investigation of the blades showed that the cause of the failures was the initiation and growth of a fatigue crack from a corrosion pit. ČEZ, a. s. has developed, based on the knowledge obtained by EPRI (Electric Power Research Institute), a methodology which can, in real conditions during checks of turbines, reliably detect the parameters of corrosion pits and predict the possibility of development of fatigue damage from detected pits. The process of methodology and its uncertainties (influence of filling of pits with oxides, cyclic stress calculations, and the selection of the geometric factor Y) are summarized.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/TE01020068" target="_blank" >TE01020068: Centrum výzkumu a experimentálního vývoje spolehlivé energetiky</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

MATEC Web of Conferences

ISSN

2261-236X

e-ISSN

2261-236X

Svazek periodika

188

Číslo periodika v rámci svazku

04020

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

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EID výsledku v databázi Scopus

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