Analysis of Oil Debris in an Aero Gas Turbine Engine
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Oil debris count is an important health monitoring parameter in aero gas turbine engine. Present paper deals with the oil debris analysis collected from the bearing houses and gear box of a military gas turbine engine. Due to relative motion between stationary parts, wearing-out has taken place in turbine bearing house. Improper assembly or dimensional inaccuracies found to be the root cause of high debris generation. For wearing-out of the drive shaft in gear box, lapses in assembly procedure and improper tolerances are found to be responsible. Though high ‘g’ maneuvers of the aircraft, hard landings, missile launch and bird hit or foreign object impact can lead to such high debris in the oil circuit, utmost care needs to be taken during assembly.
KeywordsDebris count Oil debris Magnetic chip detector Aero gas turbine engine
The authors are very grateful to the Chief Executive, CEMILAC, Bangalore, India, for his kind permission for publishing this paper. The authors are also very thankful to the General Manager and Engineers of Hindustan Aeronautics Limited, Bangalore, and Officers of Aeronautical Quality Assurance (Engines), Bangalore, for their cooperation and support during this study.
- 1.H.I.H. Saravanamuttoo, G.F.C. Rogers, H. Cohen, Gas Turbine Theory (Pearson Education, London, 2001)Google Scholar
- 3.R. Bhaskar, Aircraft Propulsion (Elsevier, India, 2008)Google Scholar
- 4.T. Tauber, Full-flow debris monitoring in gas turbine engines, in ASME paper, (1981), pp. 9–12Google Scholar
- 5.R.F. Orsagh, J. Sheldon, C. Klenke, Prognostics/diagnostics for gas turbine engine bearings, in Proceedings of IEEE Aerospace Conference (2003)Google Scholar
- 11.J.L. Miller, D. Kitaljevich, In-line oil debris monitor for aircraft engine condition assessment, in 2000 IEEE Aerospace Conference Proceedings, vol. 6, pp. 49–56Google Scholar
- 12.P.J. Dempsey, N. Bolander, C. Haynes, A.M. Toms, Investigation of Bearing Fatigue Damage Life Prediction Using Oil Debris Monitoring, NASA/TM-2011-217117 (NASA, Washington, DC, 2011)Google Scholar
- 13.L.C. Jaw, Recent advancements in aircraft engine health management (EHM) technologies and recommendations for the next step, in ASME Paper No. GT2005-68625 (2005)Google Scholar
- 14.J. Edmonds, M.S. Resner, K. Shkarlet, Detection of precursor wear debris in lubrication systems. in Aerospace Conference Proceedings, 2000 IEEE. vol. 6. IEEE, 2000Google Scholar
- 17.T.A. Harris, R.M. Barnsby, Tribological performance prediction of aircraft gas turbine mainshaft ball bearings. Tribol. Trans. 41(1), 60–68 (1998)Google Scholar
- 20.A.K. Das, Metallurgy of Failure Analysis (McGraw Hill, NY, 1997)Google Scholar
- 21.R. Reichelt, Scanning electron microscopy, in Science of Microscopy. Springer, New York, 2007, pp. 133–272.Google Scholar