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http://dx.doi.org/10.3795/KSME-A.2014.38.10.1185

Life Assessment of Gas Turbine Blade Based on Actual Operation Condition  

Choi, Woo Sung (Power generation Laboratory, KEPCO Research Institute)
Song, Gee Wook (Power generation Laboratory, KEPCO Research Institute)
Chang, Sung Yong (Power generation Laboratory, KEPCO Research Institute)
Kim, Beom Soo (Power generation Laboratory, KEPCO Research Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.10, 2014 , pp. 1185-1191 More about this Journal
Abstract
Gas turbine blades that have complex geometry of the cooling holes and cooling passages are usually subjected to cyclic and sustained thermal loads due to changes in the operating characteristic in combined power plants; these results in non-uniform temperature and stress distributions according to time to gas turbine blades. Those operation conditions cause creep or thermo-mechanical fatigue damage and reduce the lifetime of gas turbine blades. Thus, an accurate analysis of the stresses caused by various loading conditions is required to ensure the integrity and to ensure an accurate life assessment of the components of a gas turbine. It is well known that computational analysis such as cross-linking process including CFD, heat transfer and stress analysis is used as an alternative to demonstration test. In this paper, temperatures and stresses of gas turbine blade were calculated with fluid-structural analysis integrating fluid-thermal-solid analysis methodologies by considering actual operation conditions. Based on analysis results, additionally, the total lifetime was obtained using creep and thermo-mechanical damage model.
Keywords
Gas Turbine; Blade; FSI Analysis; Life Assessment;
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