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발전용 가스터빈 블레이드 수명 평가를 위한 열 피로 시험설비
송인환(Inhwan Song),정진성(Jinesung Jeong),강연관(Yeonkwan Kang),김영대(Youngdae Kim),방명환(Myeonghwan Bang),양지효(Jihyo Yang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The recent fatigue failure on gas turbine blades caused by thermal fatigue is major issue when the gas turbines start-up and shut down frequently to keep balancing the grid as the power generation using renewable energy increases. The present study concentrates on evaluating the thermal fatigue life of blade simulating start-up and shut down of actual gas turbine operation. The experimental model of this study is actual 1<SUP>st</SUP> stage blades of industrial gas turbine, which are manufactured including internal cooling passages and film cooling and tip holes. The material of blades is IN738LC. A cooling air into turbine blade is provided from compressor during test to mimic the actual gas turbine operation. The thermocouples are installed at inlet and outlet of test section, and they are also attached on blade surface to measure temperature on blade surface. The heat load and total number of cycles for thermal fatigue test are calculated using lumped capacity method considering internal cooling passages of blade and Coffin-Manson equation about low cycle fatigue test result of the IN738LC. The heat load cycle and temperature measured from installed thermocouples show that present test facility for thermal fatigue of gas turbine blades are reliable.
발전용 가스터빈 블레이드 수명 평가를 위한 열 피로 시험설비
송인환(Inhwan Song),정진성(Jinesung Jeong),강연관(Yeonkwan Kang),김영대(Youngdae Kim),방명환(Myeonghwan Bang),양지효(Jihyo Yang) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The recent fatigue failure on gas turbine blades caused by thermal fatigue is major issue when the gas turbines start-up and shut down frequently to keep balancing the grid as the power generation using renewable energy increases. The present study concentrates on evaluating the thermal fatigue life of blade simulating start-up and shut down of actual gas turbine operation. The experimental model of this study is actual 1<SUP>st</SUP> stage blades of industrial gas turbine, which are manufactured including internal cooling passages and film cooling and tip holes. The material of blades is IN738LC. A cooling air into turbine blade is provided from compressor during test to mimic the actual gas turbine operation. The thermocouples are installed at inlet and outlet of test section, and they are also attached on blade surface to measure temperature on blade surface. The heat load and total number of cycles for thermal fatigue test are calculated using lumped capacity method considering internal cooling passages of blade and Coffin-Manson equation about low cycle fatigue test result of the IN738LC. The heat load cycle and temperature measured from installed thermocouples show that present test facility for thermal fatigue of gas turbine blades are reliable.