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Paper
Title

Physical and Numerical Investigations of Gas Turbine Blades Failure

مجله مواد دوستدار محیط، دوره: 1، شماره: 2
Year: 1396
COI: JR_JEFM-1-2_008
Language: EnglishView: 208
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Authors

H.R. Faridi - Department of Materials Science and Engineering, Hamadan University of Technology, Hamadan, Iran.
A. Momeni - Department of Materials Science and Engineering, Hamadan University of Technology, Hamadan, Iran.
M. Mohammadpour - Department of Materials Science and Engineering, Hamadan University of Technology, Hamadan, Iran.
V. Sarfarazi - Department of Mining Engineering, Hamadan University of Technology, Hamadan, Iran.

Abstract:

Two blade samples from the first and second stages of a gas turbine were investigated to understand the reason of fracture. All samples suffered excessive heat superficially. Using a TBC layer on top of Diffusion coating will be a reasonable solution for protecting the blades. Although in case of the first stage blades cracking was postponed, the thermomechanical fatigue cracks still originated from the blade surface. It was observed that the damage of the thermal barrier coating layer would lead to the overheating of the blades, promoting the rate of creep and rafting of g¢ precipitates. This phenomenon was more severe in the second stage samples with more damaged protective layers. It was found that the chemical composition of the fuel gas may increase the potential and rate of corrosion and damage to the blades. Concurrent with physical investigation, numerical simulation was performed to study the effect of particle impact into the blade. By changing the particle radii and its position, damage area was inspected. Numerical simulation shows that particle radii and its position have an important effect on the chipping removal from the blade.

Keywords:

Paper COI Code

This Paper COI Code is JR_JEFM-1-2_008. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/897120/

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Faridi, H.R. and Momeni, A. and Mohammadpour, M. and Sarfarazi, V.,1396,Physical and Numerical Investigations of Gas Turbine Blades Failure,https://civilica.com/doc/897120

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