Most of the improvement in aviation during the last 7 decades has been mainly due to the advancement in the propulsion systems and technologies. The Advisory Council for Aeronautics Research in Europe (ACARE) has set ambitious objectives to be completed by 2020 and beyond; the major being reduction of CO2 emissions by more than 50%, for which significant improvement of the propulsion systems is required. However, it appears that a technological plateau has been reached with conventional engine architecture. The paper presents a novel hybrid engine architecture with inter turbine burner (ITB). The hybrid engine with two combustion chambers offers the possibility of operating on hydrocarbon fuels as well as liquid hydrogen, enabling the aimed reduction of CO2 emissions by 50% without encountering the storage problems related to pure hydrogen powered aircraft.

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