Multidisciplinary design optimization of novel and flexible aircraft configurations: design, build, test and fly [MIDAS]

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Air transport policies and operators, and aircraft manufacturers are demanding safer and greener airtransportation systems as well as reduced development and operating costs, the latter by 20% and 50% in theshort and long term, respectively, which has resulted in a need for a paradigm shift in aircraft design. To thisend, the adoption of novel configurations, lighter composites to increase payload, energy efficient propulsionsystems, and morphing control surfaces to reduce drag have received considerable attention in the researchcommunity for the past five years. An interesting mid-term solution is the increase of wing aspect-ratio toreduce the aerodynamic induced drag and thus decrease fuel consumption and pollutant emissions. However,by designing more slender wings, the wing structure becomes more flexible and prone to higher deflectionsunder the same operation conditions. This effect may lead to changes in aeroservoelastic performance, whichmay lead to dynamic instabilities. Hence the importance of taking into account geometric nonlinearities in thedesign of high aspect-ratio wings. Over the long term, novel configurations such as the blended-wing-body andjoined-wing configurations present promising solutions to replace the current conventional designs. In thisproject, a two-pronged approach is proposed to study a number of facets in advanced aircraft design: (i) newmultidisciplinary design optimization methodologies to analyze and experimentally evaluate and validate novelblended-wing-body configurations for operation in the transonic range for business jets, and (ii) theaeroservoelastic performance evaluation of flexible and nonlinear high aspect-ratio wings for regional transportaircraft.