Turbo Design to Mitigate Forcing
The constant improvement of aircraft engine performance during the last 30 years had
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Publication Reference: RTO-EN-AVT-207DOI: 10.14339/RTO-EN-AVT-207-11-pdf Download View All Papers View Meta Data Share
Abstract: The constant improvement of aircraft engine performance during the last 30 years had leaded towards complex components, reduced masses and higher temperatures, particularly relevant to military propulsion. As a consequence, the structural loads are significantly increased in complex assemblies, with highly loaded parts, and with narrow security margins regarding static stresses, temperatures, cyclic loads and vibration. A 40% increase of the shop visit has been achieved since 15 years thanks to a better understanding of the ageing process. During the aircraft engine development process, structural engineers address from the architecture definition to the multidisciplinary design (aerodynamic iteration, thermo-mechanic design) and finally the certification documents demonstrating no hazardous effects appear at frequencies above 10e-9 per flight hour. The RTO/VKI Lecture Series covered the following issues: aircraft engine global engine dynamics, prediction of the engine integrity, foreign object damage, thermal stresses, aeromechanical design, high cycle fatigue calculations, forced response prediction, flutter, mistuning and non linear dynamics, design strategies to mitigate unsteady forcing, creep life prediction.
Author(s): Clark, J.P.
Publication Reference: RTO-EN-AVT-207
Publication Identifier: RTO-EN-AVT-207 AC/323(AVT-207)TP/455
ISBN (if applicable): N/A
Classification: PUBLIC RELEASE
Access: Open Access
Subjects: Thermal and Thermodynamic Technologies and Devices
Keywords: gas turbine engines;structural dynamics;turbo-machinery;vibration;creep;fatigue