Gas turbines generating power operate in high temperature condition and use natural gas as fuel. For that reason, there are many cases where damage is done to the hot gas parts caused by the high temperature and many accidents occur like gas explosions, then various efforts are needed to maintain the hot gas parts and prevent accidents. It is difficult to find the root causes of damage to the hot gas parts from the gas explosion caused by gas leakage through rotor cooling air line from fuel gas heat exchanger during the shut down. To prevent gas turbine from damage, removal of gas leakage inside of gas turbine is required by purging the turbine before firing, improving the fuel gas heating system and installing alarm systems for detecting gas leakage from stop valve to turbine while the gas turbine has shut down.

Abstract
 1. 서론
 2. 가스터빈 고온부품의 손상 경향
  2.1 열화에 의한 소손
  2.2 이물질 충격에 의한 물리적 손상
  2.3 크리프 및 피로에 의한 균열손상
 3. 부품별 손상형태와 원인분석
  3.1 연료가스 열교환기 손상
  3.2 연소실 고온부품 손상
  3.3 터빈 고온부품 손상
  3.4 터빈 냉각용 공기 Filter 손상
 4. 현상학적 고찰을 통한 손상 메커니즘 규명
  4.1 가스 누설 과정
  4.2 발화 과정
  4.3 터빈 냉각공기용 Filter 손상 과정
  4.4 연료가스 열교환기 손상 과정
  4.5 터빈과 연소실 고온부품 손상 과정
 5. 결론
 6. 참고문헌

• 유원주 | Won-Ju Yu
• 이승현 | Seong-Hyun Lee