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Various aerodynamics, structural dynamics, and control design and experimental studies are presented with the aim of advancing green and morphing aircraft research. The results obtained with an in-house CFD code are compared and validated with those of two NASA codes. The aerodynamical model of the UAS-S45 morphing wing as well as the structural model of a morphing winglet are presented. A new design methodology for oleo-pneumatic landing gear drop impact dynamics is presented as well as its experimental validation. The design of a nonlinear dynamic inversion (NDI)-based disturbance rejection control on a tailless aircraft is presented, including its validation using wind tunnel tests.

Technology --- Engineering --- History. --- tailless aircraft --- nonlinear dynamic inversion --- disturbance observer --- anti-windup --- flight tests --- wind tunnel --- morphing airfoil optimization --- parameterization --- PSO --- aerodynamic performance --- computational fluid dynamics --- turbulence modeling --- flat plate flow --- backward-facing step flow --- airfoil flow --- cascade flow --- adaptive structures --- FE modeling --- stress analysis --- loads assessment --- landing gear dynamics --- drop impact --- oleo-pneumatic shock absorber --- ground loads --- spin-up --- spring-back --- n/a

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Various aerodynamics, structural dynamics, and control design and experimental studies are presented with the aim of advancing green and morphing aircraft research. The results obtained with an in-house CFD code are compared and validated with those of two NASA codes. The aerodynamical model of the UAS-S45 morphing wing as well as the structural model of a morphing winglet are presented. A new design methodology for oleo-pneumatic landing gear drop impact dynamics is presented as well as its experimental validation. The design of a nonlinear dynamic inversion (NDI)-based disturbance rejection control on a tailless aircraft is presented, including its validation using wind tunnel tests.

Technology --- Engineering --- tailless aircraft --- nonlinear dynamic inversion --- disturbance observer --- anti-windup --- flight tests --- wind tunnel --- morphing airfoil optimization --- parameterization --- PSO --- aerodynamic performance --- computational fluid dynamics --- turbulence modeling --- flat plate flow --- backward-facing step flow --- airfoil flow --- cascade flow --- adaptive structures --- FE modeling --- stress analysis --- loads assessment --- landing gear dynamics --- drop impact --- oleo-pneumatic shock absorber --- ground loads --- spin-up --- spring-back --- History. --- History. --- tailless aircraft --- nonlinear dynamic inversion --- disturbance observer --- anti-windup --- flight tests --- wind tunnel --- morphing airfoil optimization --- parameterization --- PSO --- aerodynamic performance --- computational fluid dynamics --- turbulence modeling --- flat plate flow --- backward-facing step flow --- airfoil flow --- cascade flow --- adaptive structures --- FE modeling --- stress analysis --- loads assessment --- landing gear dynamics --- drop impact --- oleo-pneumatic shock absorber --- ground loads --- spin-up --- spring-back

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This Special Issue is a collection of the latest research articles on various topics related to wind turbine aerodynamics, which includes wind turbine design concepts, tip loss correction study, wind turbine acoustics modelling, and the vertical axis wind turbine concept.

Technology: general issues --- wind turbine aerodynamics --- actuator disc --- AD/NS --- tip loss correction --- blade element momentum --- orthopter --- vertical axis wind turbine --- power coefficient --- torque coefficient --- shear flow --- wind tunnel --- CFD --- delayed detached-eddy simulation --- wind turbine --- tilt angle --- unsteady aerodynamics --- computational fluid dynamics --- wind tunnel experiment --- wind turbine airfoil --- turbulence --- Gurney flap --- aerodynamic characteristics --- aeroacoustics --- noise modelling --- noise control --- coned rotor --- aerodynamics --- n/a

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This Special Issue is a collection of the latest research articles on various topics related to wind turbine aerodynamics, which includes wind turbine design concepts, tip loss correction study, wind turbine acoustics modelling, and the vertical axis wind turbine concept.

Technology: general issues --- wind turbine aerodynamics --- actuator disc --- AD/NS --- tip loss correction --- blade element momentum --- orthopter --- vertical axis wind turbine --- power coefficient --- torque coefficient --- shear flow --- wind tunnel --- CFD --- delayed detached-eddy simulation --- wind turbine --- tilt angle --- unsteady aerodynamics --- computational fluid dynamics --- wind tunnel experiment --- wind turbine airfoil --- turbulence --- Gurney flap --- aerodynamic characteristics --- aeroacoustics --- noise modelling --- noise control --- coned rotor --- aerodynamics --- wind turbine aerodynamics --- actuator disc --- AD/NS --- tip loss correction --- blade element momentum --- orthopter --- vertical axis wind turbine --- power coefficient --- torque coefficient --- shear flow --- wind tunnel --- CFD --- delayed detached-eddy simulation --- wind turbine --- tilt angle --- unsteady aerodynamics --- computational fluid dynamics --- wind tunnel experiment --- wind turbine airfoil --- turbulence --- Gurney flap --- aerodynamic characteristics --- aeroacoustics --- noise modelling --- noise control --- coned rotor --- aerodynamics

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Additive manufacturing (AM), more commonly known as 3D printing, has grown trememdously in recent years. It has shown its potential uses in the medical, automotive, aerospace, and spare part sectors. Personal manufacturing, complex and optimized parts, short series manufacturing, and local on-demand manufacturing are just some of its current benefits. The development of new materials and equipment has opened up new application possibilities, and equipment is quicker and cheaper to use when utilizing the new materials launched by vendors and material developers. AM has become more critical for the industry but also for academics. Since AM offers more design freedom than any other manufacturing process, it provides designers with the challenge of designing better and more efficient products.

Technology: general issues --- History of engineering & technology --- additive manufacturing --- modular design --- design-for-manufacturability --- design optimization --- part consolidation --- product re-design --- topology optimization --- design for additive manufacturing --- 3D printing --- aerospace --- full-life cycle manufacturing flow --- airfoil --- carbon fiber tubes --- telescoping spars --- chevrons --- porous scaffold design --- tetrahedral implicit surface modeling --- triply periodic minimal surface --- selective laser melting (SLM) --- Ti6Al4V --- structure–property relationship --- microstructure --- Hall–Petch relationship --- n/a --- structure-property relationship --- Hall-Petch relationship