When a component, as heat shields, degrade, two stages can be distinguished. First, a potential failure appears, which could evolve to the second stage and become a functional failure. The time between these two stages is called delay-time, which has been widely studied in literature to determine when to inspect to avoid breakdown. These studies have shown only single analysis criteria to find failure finding interval (FFI). In order to overcome this limitation, we developed a novel strategy to apply multicriteria methodology to optimize FFI. Our approach considers availability, system breakdown risk and reliability analysis from a systemic perspective, studying heat shields as groups, according to their location in the combustion chamber, regardless of age defect. Hence, it is not necessary to check every one of the shields. Our results show an optimal FFI policy subject to a determined breakdown risk level. This analysis may be adaptable to other components that can be grouped together.
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July 2015
Research-Article
Optimal Failure-Finding Intervals for Heat Shields in a Gas Turbine Combustion Chamber Using a Multicriteria Approach Available to Purchase
Alejandro Martínez,
Alejandro Martínez
Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
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Gloria Lara,
Gloria Lara
Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
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Rodrigo Pascual,
Rodrigo Pascual
Director of Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
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Enrique López Droguett
Enrique López Droguett
Center for Risk and Reliability,
Department of Mechanical Engineering,
e-mail: [email protected]
Department of Mechanical Engineering,
University of Maryland
,College Park, MD 20743
e-mail: [email protected]
Search for other works by this author on:
Alejandro Martínez
Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
Gloria Lara
Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
Rodrigo Pascual
Director of Department of Mining Engineering,
e-mail: [email protected]
Pontificia Universidad Católica de Chile
,Santiago 7820436
, Chile
e-mail: [email protected]
Enrique López Droguett
Center for Risk and Reliability,
Department of Mechanical Engineering,
e-mail: [email protected]
Department of Mechanical Engineering,
University of Maryland
,College Park, MD 20743
e-mail: [email protected]
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received August 27, 2014; final manuscript received November 14, 2014; published online December 30, 2014. Editor: David Wisler.
J. Eng. Gas Turbines Power. Jul 2015, 137(7): 072501 (6 pages)
Published Online: July 1, 2015
Article history
Received:
August 27, 2014
Revision Received:
November 14, 2014
Online:
December 30, 2014
Citation
Martínez, A., Lara, G., Pascual, R., and López Droguett, E. (July 1, 2015). "Optimal Failure-Finding Intervals for Heat Shields in a Gas Turbine Combustion Chamber Using a Multicriteria Approach." ASME. J. Eng. Gas Turbines Power. July 2015; 137(7): 072501. https://doi.org/10.1115/1.4029202
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