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Exhaust gas temperature measurements in diagnostic examination of naval gas turbine engines Part III Diagnostic and operating tolerances

Abstract

The third part of the article presents a method for detecting failures of the automatic engine control system with the aid of an exhaust gas temperature setter, specially designed and machined for this purpose. It also presents a procedure of identifying the operating tolerances and determining the diagnostic tolerances for the exhaust gas temperature recorded in the naval turbine engine during the start-up and acceleration processes. The diagnostic tolerances were determined using the statistic inference, based on the hypothesis about the normal distribution of the starting exhaust gas temperature dispersion at the initial time of engine operation. The above hypothesis was verified using the non-parametric statistic test χ2 for examining the consistency of the empirical distribution with the assumed normal distribution. As a result of the examination, satisfactory convergence of the compared distributions was obtained which made the basis for assuming the three-sigma limits of the diagnostic tolerance for the analysed engine control parameter.

Keywords:

technical diagnostics, naval turbine engines, exhaust gas temperature, operating and diagnostic tolerances

Details

Issue
Vol. 18 No. 4(71) (2011)
Section
Latest Articles
Published
06-01-2012
DOI:
https://doi.org/10.2478/v10012-011-0026-7
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Author Biography

Zbigniew Korczewski,
Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology



Authors

Zbigniew Korczewski

Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology

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