Guest Lecture: Rauno Cavallaro- mUNIVERSIDAD CARLOS III – MADRID My research activities cover a wide range of physical and engineering problems. My main fields of investigation concern aircraft design and flight physics; in particular, I am active in Fluid-Structure Interaction problems, mainly applied to unconventional aircraft configuration, UAVs and MAVs. I am also very active in the field of multidisciplinary design optimization, drag minimization, and dynamical systems. In 2015, I have been granted a prestigious international post-doc fellowship at the Technion (Israel Institute of Technology) where I implemented a new reduced order formulation for geometrically nonlinear structures, to have a low-cost/feasible tool for the nonlinear aeroelastic design of very deformable aerospace structures like UAVs and HALE and, in general, of the aviation of the future. I earned the doctoral degree at University of California San Diego, UCSD in December of 2014. My research carried out both at Aerospace Engineering (at San Diego State University, SDSU) and Structural Engineering (at UCSD) departments focused on nonlinear aeroelasticity applied to novel aircraft configurations, and on aerodynamic and structural models adopted in various aerospace engineering problems. Before pursuing my PhD, I worked at Bauhaus Luftfahrt, a German research institute financed by Airbus Group, MTU, Liebherr Aerospace and Bavarian Government. I oversaw the conceptual/preliminary and aerodynamic design of PrandtlPlane (Box-Wing) configuration. I earned my master’s degree in aerospace engineering at the Aerospace Engineering Department by University of Pisa. I was the recipient of several prestigious awards, among which the prestigious Collier Research HyperSizer/AIAA Structures Best Paper Award, earned at the 53rd AIAA/ASME/ASCE/AHS/ASC Conference (2012), and the 2012-2013 Inamori Fellowship, Kyocera Corporation, granted to the best 10 students of the whole San Diego State University. My scientific production counts of 26 peer-reviewed journal papers and includes an invited review on the topic of Joined Wings, which spanned a whole volume of the prestigious journal "Progress in Aerospace Sciences". I have been also invited to give several speeches at prestigious institutions or scientific associations (AIAA Technical Committee, DLR, EU-funded project PARSIFAL, etc.). I have been working within several funded projects by universities, governmental departments, research institutions and industries in the US, Europe and Israel. I am acting/have acted as PI or co-PI in: ¿ INDIGO (funded by the Horizon Europe scheme, on the reduction of environmental impact close to airports) ¿ OPERATIONAL (funded by the Spanish Government, on the design of regional hydrogen-powered aircraft) ¿ HYDROGENATING (funded by Madrid Region, on the design of hydrogen-powered aircraft) ¿ ELECTRO (funded by CIRA on the multidisciplinary design and optimization of electric aircraft) ¿ OneIRE (funded by Airbus, on the aerostructural and aeroelastic optimization of unconventional rear-end of new aircraft) ¿ TRASCEND (funded by Aernnova, on the aerostructural and aeroelastic design of large UAVs). ¿ PARSIFAL (funded by the PARSIFAL H2020project, on the aeroelasticity of unconventional greener aircraft) I have also been in the Scientific team of a national project funded by Spanish government, where I was responsible of the aeroelastic aspects of a flapping wing. So far, I have advised 54 Graduate and Undergraduate thesis works; at the doctoral level, I have successfully tutored 1 PhD and I am currently co-advising 5 Doctoral theses. In terms of teaching, since I started my job at UC3M, I have been giving approximately 950 hours of frontal teaching in several subjects as Aircraft Design, Structural design, Helicopters, both the Master and Graduate level. Moreover, I am the coordinator the MDO module within the professional UC3M-Airbus Master in “Airframe Structures”.

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The consolidate growth in the European air traffic and passengers’ number is driving commercial aviation to face important changes, like the need to reduce environmental impact and to satisfy an increasing demand for air transportation, it is a common thought that a technological breakthrough is required to achieve such goal. New technological approaches are being pursued for the new aircraft generation, like distributed propulsion systems, structures characterized by new materials and manufacturing processes and non-conventional wing layouts, such as the blended-wing and the box-wing concepts. Nevertheless, to make such new technologies market competitive a new design approach may be needed. Some of these new concepts, in fact, may be remarkably affected by aeroelastic issues, which need to be taken into account in early design, and their enhanced structural flexibility or their peculiar layout may exacerbate coupling between different disciplines (e.g., flight dynamics and aeroelasticity). Moreover, loads and aerodynamic performances prediction may radically differ with respect to what achieved during conceptual design, if considering plain/rigid configurations only. This course is divided in two parts, each aiming at studying two different aspects. The first one is the formulation of a unified flight-dynamic and aeroelastic model for stability analysis. After deriving the equations of the free-flying flexible aircraft, emphasis is placed on the assessment of aerodynamic forces with an approach able to cover a vast range of frequencies, important to cover the physical phenomena. The final system of equations allows to study and understand the sources of influences of structural flexibility on typical flight mechanics modes as well as effects of free-free condition on aeroelastic instabilities. Application to unconventional aircraft is finally shown. In the second part a model for high-fidelity gradient-based aerostructural optimization of wings, assisted by algorithmic differentiation and including aerodynamic and structural nonlinearities, is presented. Focus is on the enhanced modularity: each discipline solver, employing algorithmic differentiation for the evaluation of adjoint-based sensitivities, is interfaced at high level by means of a wrapper to both solve the aerostructural primal problem and evaluate discrete-consistent gradients of the coupled problem. Potentials of a framework featuring this approach is applied to perform aerostructural optimization of aeroelastic test cases based on testcases of industrial relevance, showing the importance of taking into account the aerostructural coupling when performing wing shape optimization.

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P.D.2-2 - Maggio

26 Aprile 9-12 e dalle 13:30 alle 16:30 – Sala C. Ferrari II piano DIMEAS 27 Aprile 9-12 e dalle 13:30 alle 16:30 – Sala C. Ferrari II piano DIMEAS