The effects of ambient temperature and shaft power variations on creep life\nconsumption of compressor turbine blades of LM2500+ industrial gas turbine\nengine are investigated in this work. An engine model was created in PYTHIA\n(Cranfield University�s gas turbine software) for the analysis. Blade thermal\nand stress models were developed and used together with Larson-Miller Parameter\nmethod for life analysis. Mean life reduction index, which is the propensity\nof a given effect to reduce engine life by half, is developed for each effect\nand applied in this research to compare the impacts of the different effects\non the blade creep life. It was observed that blade life will be halved when ambient\ntemperature is increased by 8.11 units while 13.64% increase in shaft\npower reduces blade life by a factor of 2. The results of this work will guide\nengine operators in making decisions concerning operating at part loads.
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