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Main characteristics of regenerated and intercooled propulsion systems


Autore: R. Andriani, U. Ghezzi

Collana: BT - 34 - Mag 06 - Energy: production, distribution and conservation

The analysis carried on has been about the possibility of the introduction in a gas turbine engine, high by-pass ratio turbofan, of the practices of regeneration and intercooled staged compression process. Both these processes are well known in static power plants, but the utilization in a propulsion system leads to not easy to solve problems of size, weight and integration with the engine and the aircraft. However the thermodynamic study has shown as, if solved the problems above, the benefits on the performances should be significant. In fact the introduction of regeneration in a turbofan engine has increased the thermal and propulsion efficiencies leading to a reduction of the specific fuel consumption of more tan 10% at low pressure ratios. The price to pay is a reduction of the same order of the specific thrust. The reduction of specific thrust could be balanced by the intercooled staged compression process, that has showed to have good benefits on it. The intercooling practice seems to be more feasible respect regeneration for the simpler flow pattern. The next step will be the simultaneous application of regeneration and intercooling in an aero engine to see their effect on the main performances and efficiencies.

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