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Abstract
Turbojet engines are currently used for military application under training and combat modes. Their operation at extreme conditions often unscheduled with need based throttle excursions lead to high cyclic stresses on engine components and unusual demands on line replaceable units and accessories. As a result, a number of engines are forced for premature withdrawal from service affecting the flight schedule of the operator. This present paper presents the trend analysis of various defects encountered in a military turbojet engine and its accessories. This analysis will help in identifying the probable causes of the defects, time of engine withdrawal and whether they are of reoccurring nature or isolated cases so that corrective action can be initiated to avoid such snags in future.
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References
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References
Cohen, H., Rogers, G.F.C. and Saravanamuttoo, H.I.H., "Gas Turbine Theory", Longman Group Limited, 1996.
Alexandre Nairac., Neil Townsend., Roy Carr., Steve King., Peter Cowley and Lionel Tarassenko., "A System for the Analysis of Jet Engine Vibration Data", Journal of Integrated Computer aided Engineering, Vol.6, No.1, 1999, pp.53-66.
Suresh, S., "Fatigue of Materials", Second Edition, 2003, Cambridge University Press, pp. 256-257.
Hakan Ozaltun, Jeremy Seidt, M., et. al., "An Energy-Based Method for Uni-Axial Fatigue Life Calculation", GT2009-59512, Proceedings of ASME Turbo Expo 2009, June,Orlando, Florida, USA.
Garassino, A., Bois, P., "An Advanced Control System for Turbofan Engine: Multivariable Control and
Fuzzy Logic (Application to the M88-2 Engine)", AGARD PEP Symposium "Advanced Aero-Engine
Concepts and Controls", Seattle, USA, 1995.
Dambrosio, L., Camporeale, S., Fortunato, B., "Performance of Gas Turbine Power Plants Controlled by
One Step Ahead Adaptive Technique", ASME Turbo Expo 2000, 2000-GT-0037, Munich, 2000.
Rysdyk, R., Leonhardt, B., Calise, A., "Development of an Intelligent Flight Propulsion and Control System; Nonlinear Adaptive Control", AIAA Guidance, Navigation, and Control Conference and Exhibit,
AIAA-2000-3943, Denver, 2000.
Ashok Koul, et. al., "Residual Life Assessment and Life Cycle Management of Design Life Expired
Discs", GT2009-60352, Proceedings of ASME Turbo Expo 2009, June, Orlando, Florida, USA.