Oxidation-Induced Damage Modeling in Micro Gas-Turbine Combustion Chambers
نویسندگان
چکیده
Combustion chambers of micro gas-turbines are generally operated under very lean global air-fuel ratios for two main reasons: to constrain the production pollutants (NOx), and cool-down metal walls with cooling air. The abundancy oxygen contained in air flowing over surfaces, together high temperatures due combustion, constitute an oxidizing environment. thin oxide layer can crack alternating system operative conditions, potentially initiating a detrimental combustion chamber's life. An oxidation damage term should be computed order provide information component's In this paper, oxidation-induced model superalloy INCONEL 718 is applied chamber fitting MTT Enertwin gas-turbine. Oxidation growth material parameters obtained from experimental data. phasing thermal loads mechanical strains also considered. results show distribution on which depend temperature strain rate, suggesting that mechanism relevant given operation conditions. Therefore, approach incorporated broader life-assessment methodology, includes oxidation, creep fatigue.
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ژورنال
عنوان ژورنال: Procedia structural integrity
سال: 2022
ISSN: ['2452-3216']
DOI: https://doi.org/10.1016/j.prostr.2022.12.219