Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Fracture Mechanism of Gas Turbine Compressor Blades in a Combined Cycle Power Plant

복합화력발전소 가스터빈 압축기 블레이드에 대한 손상원인 고찰

  • 양경현 (한국전력공사 전력연구원) ;
  • 송오섭 (충남대학교 기계공학과) ;
  • 조철환 (한국전력공사 전력연구원) ;
  • 윤완노 (한국전력공사 전력연구원) ;
  • 정남근 (한국전력공사 전력연구원)
  • Received : 2010.08.10
  • Accepted : 2010.10.08
  • Published : 2010.11.20
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Abstract

Gas turbine compressor blades used in a combined cycle power plant are possibly damaged and fractured during their operation. There are two possible causes of the failure of compressor blades; one is a defect of material quality which can be detected through some microscopic inspections for the fracture section, the other is high cycle fatigue problem caused by vibration and can be diagnosed by carrying out dynamic characteristics analysis for the blades. In this paper, in order to determine the cause of the failure of compressor blades in a combined cycle power plant, examination of the fracture section and the propagation mechanism of the crack via stress analysis are performed. Dynamic characteristics analysis via FRF estimation is also performed to identify the cause of failure.

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References

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