NDLI: The jt9d jet engine diagnostics program

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The jt9d jet engine diagnostics program

Content Provider	NASA Technical Reports Server (NTRS)
Author	Olsson, W. J.
Copyright Year	1982
Description	The various engine deterioration phenomena that affect JT9D performance retention were studied, and approaches to improve performance retention of engines were identified. The program included surveys of historical data, monitoring of in service engines, ground and flight testing of instrumented engines, analysis, and analytical modeling. Performance deterioration is made up of both short and long term modes, both of which are flight cycle related phenomena. Short term deterioration occurs primarily during airplane acceptance testing prior to delivery to the airline. This effect is caused by flight load and power induced clearance closures and engine deflections with resulting rubbing of airfoils and seals. Long term deterioration is caused by erosion of airfoils and gas path seals during ground operation and take off and by cyclic induced thermal distortion of the high pressure turbine airfoils. Studies of possible remedial approaches have shown that performance retention within 1 to 2 percent of initial revenue service performance can be achieved with a proper program of hot section and cold section maintenance.
File Size	1217212
Page Count	38
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19830009273
Archival Resource Key	ark:/13960/t6p030p8m
Language	English
Publisher Date	1982-05-01
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Performance Tests Aircraft Maintenance Deterioration Aircraft Performance Aircraft Engines Engine Parts Jet Engines Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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