Recent advances in airframe-propulsion concepts with distributed propulsion

This paper discusses design and integration associated with distributed propulsion as a means of providing motive power for future aircraft concepts. The technical work reflects activities performed within a European Commission funded Framework 7 project entitled Distributed Propulsion and Ultra-high By-Pass Rotor Study at Aircraft Level, or, DisPURSAL. In this instance, the approach of distributed propulsion includes one unique solution that integrates the fuselage with a single propulsor (dubbed Propulsive-Fuselage Concept, PFC) as well as a Distributed Multiple-Fans Concept (DMFC) driven by a limited number of engine cores - both targeting entry-in-service year 2035+. The strong coupling between airframe aerodynamics and motive power performance is analysed using high-end, low-fidelity and interlaced-fidelity methods. Although this paper reflects work-in-progress results, initial indications show for a PFC undertaking medium-to-long-range operations around 9% reduction in CO₂-emissions compared to an evolutionary, year 2035, conventional morphology gas-turbine aircraft appears to be a worthwhile target.