Detail publikace

Degradace ochranných povlaků lopatek turbín během provozu

POKLUDA, J. KIANICOVÁ, M. ŠVEJCAR, J.

Český název

Degradace ochranných povlaků lopatek turbín během provozu

Anglický název

Degradation of Protective Coatings of Turbine Blades during Exploitation.

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

en

Originální abstrakt

Diffusion Al-Si coatings are used to protect rotor blades of the aircraft engine DV2 produced by HTC-AED a.s. Považská Bystrica, Slovakia, against high-temperature corrosion in environments containing sulphur compounds. The time-temperature area beyond a critical temperature of the outgoing gas is used as an empirical exploitation parameter D indicating a degradation level. The efficiency of such approach was investigated by analyzing the surface layers of high-pressure rotor blades after exploitation corresponding to different values of D. Simple relationships between the relative width of remaining layer and the parameter D for both the back and the trough of the blade were established. The relations indicate that the relative widths of remaining layers, corresponding to the upper limit Du = 1.5.10^9 K4.s2 (already requiring repair), correspond to 60 % for the back of the blade and 32 % for the trough. Thus, the relations yield a clear geometrical interpretation of the empirical parameter D. However, the methodology fails to provide reasonable information in a special case of the gas burning outside the combustion chamber due to a sudden decrease of turbine revolutions.

Český abstrakt

Diffusion Al-Si coatings are used to protect rotor blades of the aircraft engine DV2 produced by HTC-AED a.s. Považská Bystrica, Slovakia, against high-temperature corrosion in environments containing sulphur compounds. The time-temperature area beyond a critical temperature of the outgoing gas is used as an empirical exploitation parameter D indicating a degradation level. The efficiency of such approach was investigated by analyzing the surface layers of high-pressure rotor blades after exploitation corresponding to different values of D. Simple relationships between the relative width of remaining layer and the parameter D for both the back and the trough of the blade were established. The relations indicate that the relative widths of remaining layers, corresponding to the upper limit Du = 1.5.10^9 K4.s2 (already requiring repair), correspond to 60 % for the back of the blade and 32 % for the trough. Thus, the relations yield a clear geometrical interpretation of the empirical parameter D. However, the methodology fails to provide reasonable information in a special case of the gas burning outside the combustion chamber due to a sudden decrease of turbine revolutions.

Anglický abstrakt

Diffusion Al-Si coatings are used to protect rotor blades of the aircraft engine DV2 produced by HTC-AED a.s. Považská Bystrica, Slovakia, against high-temperature corrosion in environments containing sulphur compounds. The time-temperature area beyond a critical temperature of the outgoing gas is used as an empirical exploitation parameter D indicating a degradation level. The efficiency of such approach was investigated by analyzing the surface layers of high-pressure rotor blades after exploitation corresponding to different values of D. Simple relationships between the relative width of remaining layer and the parameter D for both the back and the trough of the blade were established. The relations indicate that the relative widths of remaining layers, corresponding to the upper limit Du = 1.5.10^9 K4.s2 (already requiring repair), correspond to 60 % for the back of the blade and 32 % for the trough. Thus, the relations yield a clear geometrical interpretation of the empirical parameter D. However, the methodology fails to provide reasonable information in a special case of the gas burning outside the combustion chamber due to a sudden decrease of turbine revolutions.

Klíčová slova česky

degradace, ochrenné povlaky, listy turbán

Klíčová slova anglicky

Degradation, Protective Coatings, Turbine Blades

Rok RIV

2008

Vydáno

01.05.2008

ISBN

0000000000000

Kniha

Failures 2008

Číslo edice

1

Strany od–do

231–252

Počet stran

220

BIBTEX


@inproceedings{BUT30265,
  author="Jaroslav {Pokluda} and Marta {Kianicová} and Jiří {Švejcar},
  title="Degradation of Protective Coatings of Turbine Blades during Exploitation.",
  booktitle="Failures 2008",
  year="2008",
  month="May",
  pages="231--252",
  isbn="0000000000000"
}