Multi-disciplinary conceptual design of future jet engine systems

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Multi-disciplinary conceptual design of future jet engine systems ( multi-disciplinary-conceptual-design-future-jet-engine-syste )

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Konstantinos G. Kyprianidis Low pressure system component advancements • Switch from conventional intermediate case materials to cold composites (part in bypass stream) • Switch from conventional manufacturing of intermediate case to titanium fabrication • Switch to new materials and new manufacturing techniques in the turbine exhaust case • Switch of shaft material (Aermet100 material to metal matrix shaft) • Sufficient pressure ratio in the first booster stage to remove a stage • Sufficient stage loading in the low pressure turbine to remove a stage To accommodate these step changes in establishing the sensitivities the following algorithm is used: • First, the change is modelled as fully introduced. • The weight impact of this change is then estimated. • Finally the change in CO2 generation due to a one percent weight change is calculated. 5.3 Impact of technology shortcomings 5.3.1 Sensitivity factors and technology analysis The main aim of the work presented in this chapter has been to compute useful sensitivity factors and combine them with published information on the tech- nologies developed under the umbrella of the VITAL project [3,206], in order to assess the impact of failing to deliver expected year 2020 technology for the VI- TAL engine configurations, in terms of power plant noise and CO2 emissions. The impact of failing to deliver expected VITAL component aerodynamic improve- ments and weight reductions, as well as noise improvements has been quantified and is presented in Tables 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8 and 5.9. These results indicate the relative importance of researching certain component technologies for different engine architectures. 113

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