Author(s)

Ebigenibo Genuine Saturday¹, Thank-God Isaiah²

¹Department of Mechanical Engineering, University of Port Harcourt, Port Harcourt, Nigeria.
²Department of Mechanical Engineering, Niger Delta University, Amassoma, Nigeria.

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

Creep Life Consumption, Engine Model, Thermal Model, Stress model, Mean Life Reduction Index

Saturday, E.G. and Isaiah, T.-G. (2018) Effects of Ambient Temperature and Shaft Power Variations on Creep Life Consumption of Industrial Gas Turbine Blades. Energy and Power Engineering, 10, 120-131. doi: 10.4236/epe.2018.103009.