Nozzle guide vanes (NGV) of gas turbine engines are the first components to withstand the impingement of hot combustion gas, and therefore often suffer thermal fatigue failures in service. A lifing analysis is performed for the NGV of a gas turbine engine using the integrated creep-fatigue theory (ICFT). With the constitutive formulation of inelastic strain in terms of mechanism-strain components such as rate-independent plasticity, dislocation glide-plus-climb, and grain boundary sliding, the dominant deformation mechanisms at the critical locations are thus identified quantitatively with the corresponding mechanism-strain component. The material selection scenarios are discussed with regards to damage accumulated during take-off and cruise. The interplay of those deformation mechanisms in the failure process are elucidated such that an “optimum” material selection solution may be achieved.
- International Gas Turbine Institute
Material Selection Issues for a Nozzle Guide Vane Against Service Induced Failure
- Views Icon Views
- Share Icon Share
- Search Site
Wu, X, Zhang, Z, Jiang, L, & Patnaik, P. "Material Selection Issues for a Nozzle Guide Vane Against Service Induced Failure." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy. Seoul, South Korea. June 13–17, 2016. V006T21A001. ASME. https://doi.org/10.1115/GT2016-56120
Download citation file: