33th Congress of the International Council of the Aeronautical Sciences

01.1 - Aircraft Design and Integrated System (Basics and Theory)


F. Vidal de Saint Jean, Dassault Aviation, France

Greener aircraft is no longer an ambition, but a necessity. It requires to work simultaneously on the aircraft itself, on everyday operations and on the type of fuel used (SAF). Focusing on the platform, the challenge is to build an aircraft using all the different studies in every disciplines around aircraft performances. Indeed, this presentation will show how new technologies studied by Dassault tends to be integrated in a future concept able to gain on carbon footprint while minimizing community noise. rnrnIn the field of aerodynamics, the specificities of business jets, size and altitude of flight, make it easier to obtain an extended laminarity by adapting the aerodynamic design and the manufacturing process. A laminar high aspect ratio wing is being studied.rnIn terms of structural conception, this wing should be in composite to reduce weight penalty and ensure feasibility of the shape. Flutter control and load alleviation are managed by fly-by-wire to optimize the wing conception. rnFrom a system point of view, hot air ice protection system is no more feasible due to the coupling of high wing span with small core engine. An electrical wing ice protection system is then mandatory.rnMoreover, to allow short root chords, main landing gears usually under wings, have to be moved under the fuselage. This architecture leads to specific constraints for business jet with smaller diameter than liners. rnGoing further in reducing the carbon footprint requires moving towards hybrid powerplant, and thus the use of green hydrogen as an alternate to Kerosene. It would bring full decarbonisation; the feasibility of the integration of large and heavy pressurized tanks is explored in that direction.rnrnThe greener aircraft concept, is a complex equilibrium dealing with the above technologies. Timely deployment of aircrafts integrating major innovations requires that certification of such aircrafts is prepared in parallel to technology developme

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