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http://dx.doi.org/10.3795/KSME-A.2015.39.11.1145

A Study on Variations of the Low Cycle Fatigue Life of a High Pressure Turbine Nozzle Caused by Inlet Temperature Profiles and Installation Conditions  

Huh, Jae Sung (Aero-propulsion Research Office, Korea Aerospace Research Institute)
Kang, Young Seok (Aero-propulsion Research Office, Korea Aerospace Research Institute)
Rhee, Dong Ho (Aero-propulsion Research Office, Korea Aerospace Research Institute)
Seo, Do Young (School of Mechanical and Aerospace Engineering, Pusan Nat’l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.11, 2015 , pp. 1145-1151 More about this Journal
Abstract
High pressure components of a gas turbine engine must operate for a long life under severe conditions in order to maximize the performance and minimize the maintenance cost. Enhanced cooling design, thermal barrier coating techniques, and nickel-base superalloys have been applied for overcoming them and furthermore, material modeling, finite element analysis, statistical techniques, and etc. in design stage have been utilized widely. This article aims to evaluate the effects on the low cycle fatigue life of the high pressure turbine nozzle caused by different turbine inlet temperature profiles and installation conditions and to investigate the most favorable operating condition to the turbine nozzle. To achieve it, the structural analysis, which utilized the results of conjugate heat transfer analysis as loading boundary conditions, was performed and its results were the input for the assessment of low cycle fatigue life at several critical zones.
Keywords
High Pressure Turbine Nozzle; Directionally Solidified Material; Turbine Inlet Temperature Profile; Installation Condition; Low Cycle Fatigue Life; Critical Plane Approach;
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