Implications of day temperature variation for an aero-engine's HP turbine-blade's creep life-consumption |
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Authors: | Muhammad Naeem |
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Institution: | 1. Beijing Corrosion and Protection Center, University of Science and Technology Beijing, 30 Xueyuan Road, Beijing 100083, China;2. Institute of Emerying Technology & Industry, University of Science and Technology Beijing, 30 Xueyuan Road, Beijing 100083, China |
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Abstract: | Some in-service deterioration in any mechanical device, such as an aero-engine, is inevitable. Also in a country like Pakistan, there is a significant variation of day temperature over the year. As a result of experiencing deterioration (of the engine as a whole or any of its components individually) and/or any alteration in the conditions (such as day temperature) of incoming air stream, an engine will seek a different steady operating point thereby resulting in a variation of the spool speeds and/or turbine-entry temperatures in order to provide the same thrust. Rises in the turbine entry-temperatures and spool speeds result in greater rates of creep and fatigue damage being incurred by the hot-end components and thereby higher engine's life cycle costs.Possessing a better knowledge of the impacts of day temperature variation upon the creep life-consumption of aero-engine's hot-end components, helps the users to take wiser management-decisions. For a military aircraft's mission-profile, using a bespoke computer simulation, the implications of day temperature variation for a turbofan aero-engine's high pressure turbine-blade's creep life-consumption have been predicted. |
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