Accession Number : AD0883278

Title :   Gas Turbine Engine Health Analysis under Transient Operating Conditions for Application to an On-Board Monitoring System. Volume I.

Descriptive Note : Final rept. 28 Apr 70-31 Jan 71,

Corporate Author : EMERSON ELECTRIC CO ST LOUIS MO ELECTRONICS AND SPACE DIV

Personal Author(s) : Esser, J. R. ; Krafcik, S. F.

Report Date : APR 1971

Pagination or Media Count : 18

Abstract : A study was conducted to determine if the 'health' of an operating jet engine could be determined during the transient operating mode. This study was conducted as part of the preliminary work necessary for the design and development of an on-board NAVY fighter jet engine monitoring system. The ultimate objective of the on-board system will be to analyze the health of the engine in real-time and inform the pilot of the condition of the engine(s). This study concentrated on evaluating the gas path parameters since these parameters are responsive indicators of the majority of the causes of NAVY engine removals. The transient analysis investigated in this study indicated that parameter repeatability during the engine transient is adequate to verify specification performance. Also, gas path related anomalies can be detected through transient analysis; and corrected high pressure rotor speed used as the independent variable provides the accuracy and sensitivity necessary for baseline establishment and performance comparison. The inclusion of transient analysis with steady state analysis in a real-time on-board monitoring and analysis system will expand the mission coverage and provide an immediate performance check prior to takeoff as a result of a snap acceleration to takeoff power. (Author)

Descriptors :   *MONITORS), (*TURBOJET ENGINES, (*AIRCRAFT ENGINES, MAINTAINABILITY), GAS TURBINES, REAL TIME, JET FIGHTERS, NAVAL AIRCRAFT, PERFORMANCE(ENGINEERING), TURBOFAN ENGINES.

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE