The market of solar-powered Unmanned Aerial Vehicles (UAVs) for defence purposes and drone services is expected to grow by a factor more than 2 in the next decade. From an aircraft design perspective, main challenge scalability proposed architectures, which needed increase payload capabilities. Beside some successful examples wing-tail UAVs, newcomers are developing prototypes with tandem-wing ...

The actuator line method (ALM) is extensively used in wind turbine and rotor simulations. However, its original uncorrected formulation overestimates the forces near tip of blades does not reproduce well on translating wings. recently proposed vortex-based smearing correction for ALM a based physical mathematical properties simulation that allows more accurate general ALM. So far, to correct bl...

High aerodynamic efficiency is a key design driver for airborne wind energy systems as it strongly affects the achievable output. Conventional fixed-wing generally use aerofoils with high thickness-to-chord ratio to achieve and wing loading. The box concept suits thinner load distribution can be changed lower span structural reinforcements between upper wings. This paper presents an open-source...

How does a hovering hummingbird compensate for the loss of flight feathers during moult when the mechanism of lift force generation by flapping wings is impaired? The flight performance of five individual ruby-throated hummingbirds with moulting primary flight feathers and reduced wing area was compared with that before their moult. Hummingbirds were flown in reduced air densities using normoxi...

The goal of this thesis work has been to develop and manufacture an ice layer which was to be mounted on the tip of a scaled down wing model. The iced wing should be tested in a wind tunnel and aerodynamic comparisons should be made to the same wing without ice. The development of the ice was carried out as a modified product development process. The main differences are that there is no costum...

The NASA Common Research Model (CRM) was developed as an open-source contemporary transonic supercritical wing for various studies in aerodynamics (Vassberg et al. (2008)). Extensive detailed aerodynamic performance data have been generated since 2008, and collection of such data is still under way. These data serve as a good basis for CFD studies generally and, in particular, for the research ...

We numerically investigate the application of steady blowing to three-dimensional stalled flows around low-aspect-ratio rectangular flat-plate wings at a Reynolds number of 300. The objective of this study is to explore techniques to enhance lift by directly modifying the dynamics of the wake vortices. Out of various combinations of forcing location and direction considered, we identify two con...