Failure Modes Analysis and Mechanisms for Life Extension of Gas Turbines

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Jamshid Doost, Asghar | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45588 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s):
Abstract:
Currently, the relatively long time of the turbine life passes and their parts and equipment damage are different, that loss optimum performance and thus reducing their efficiency and may lead to faults and other unexpected stops in their production cycle. Process used to estimate the remaining life of the various components of this turbine is an important tool for improving the efficiency of these units to perform preventive maintenance. In the present thesis, the types of damages in different parts of gas turbines and various methods for detection of critical points, particularly finite element method, high cycle fatigue, modal analysis, methods to estimate the lifetime of a gas turbine and damage tolerance is investigated. In addition, this manuscript proposed a way to estimate accurately the life of gas turbines. Then life extension of gas turbines, it differs from similar operations such as maintenance, necessary measures such as modernization, upgrade and current issues and uncertainties is investigated. The results of this thesis can be extended to estimate the age of various components used in a variety of gas turbines
Keywords:
Damage Tolerance ; Aging ; Principal Structural Elements ; Gas Turbine Estimates the Life ; Gas Turbine Extend the Life