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de Wringer, Sam (author), Varriale, Carmine (author), Oliviero, F. (author)A unified approach to aircraft mission performance assessment is presented in this work. It provides a detailed and flexible formulation to simulate a complete commercial aviation mission. Based on optimal control theory, with consistent injection of rules and procedures typical of aeronautical operations, it relies on generalized...journal article 2020
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Ras, Meindert (author)The Atalanta is a palm-sized, insect-inspired, flapping-wing micro air vehicle developed by the University of Technology Delft. In its current form, the Atalanta has a lift-to-mass ratio of 0.12 which inhibits it from taking off. Getting the Atalanta to fly would greatly benefit the research into areas such as aerodynamic modelling, on-board...master thesis 2020
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Liu Xu, Vanessa (author)Electrification of aviation is driving new aircraft configurations consisting in slender, lighter wings with several propellers spread across the wing span, including the wing tips. Thinner wings with high aspect ratios tend to be more flexible, and thus, more susceptible to wing flutter, a dynamic aeroelastic instability characterised by...master thesis 2020
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van Empelen, Sjoerd (author)An experimental investigation was done regarding the propulsion system and airframe integration issues associated with the novel Flying V configuration. The experimental investigations involved a series of wind tunnel tests with a 4.6% scale half model, conducted in the TU Delft OJF low speed wind tunnel. Balance measurements allowed significant...master thesis 2020
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Nederlof, Robert (author)Propellers have a high propulsive efficiency and can help in the reduction of fuel consumption of aircraft. For propellers which are mounted in front of the wing, the interaction of the slipstream with the lifting surfaces can alter the lift distribution significantly. In the use of modern optimization tools, fast and accurate analysis of the...master thesis 2020
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de Rojas Cordero, Tomás (author)Experimental aeroelastic data is often needed in order to validate the output of fluid-structure interaction numerical simulations or to gain insight into the physics of a problem without the need of intermediate modelling. Traditional measurement approaches in wind tunnels have relied on the simultaneous use of several measurement systems ...master thesis 2020
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Ankith John Santosh, Ankith (author)In order to meet the growing market demands of quieter, more aerodynamically efficient aircrafts, manufacturers constantly strive to innovate and optimize their designs. Over the years however, the extent of innovation related to the conventional 'tubular fuselage' configurations have somewhat reached a stalemate as the gains obtained have only...master thesis 2020
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van der Meer, Sylvain (author)A propeller has a high propulsive efficiency, yet inherently leaves the air it propels swirling. The efficiency of a propeller can be enhanced by placing it in the tip vortex of a wing. Such a tip-mounted propeller configuration lets the vortex created by the wing and the vortex created by the propeller counteract each other, enhancing the...master thesis 2020
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de Jong, C.P.L. (author)Increasing endurance is a major challenge for battery-powered aerial vehicles. A method is presented which makes use of an updraft around obstacles to decrease the power consumption of a fixed-wing, unmanned aerial vehicle. Simulatory results have shown the conditions that the flight controller can fly in.<br/>The effect of a change in wind...master thesis 2020
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Yang, Jun (author), Thomas, Arun Geo (author), Singh, Satish (author), Baldi, S. (author), Wang, X. (author)Unmanned Aerial Vehicles (UAVs) have multi-domain applications, fixed-wing UAVs being a widely used class. Despite the ongoing research on the topics of guidance and formation control of fixed-wing UAVs, little progress is known on implementation of semi-physical validation platforms (software-in-the-loop or hardware-in-the-loop) for such...journal article 2020
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Fari, S. (author), Wang, X. (author), Roy, S. (author), Baldi, S. (author)The actual performance of model-based path-following methods for unmanned aerial vehicles (UAVs) shows considerable dependence on the wind knowledge and on the fidelity of the dynamic model used for design. This study analyzes and demonstrates the performance of an adaptive vector field (VF) control law which can compensate for the lack of...journal article 2020
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Heitzig, D. N.W.M. (author), van Oudheusden, B.W. (author), Olejnik, D.A. (author), Karasek, M. (author)This study investigates the wing deformation of the DelFly II in forward flight conditions. A measurement setup was developed that maintains adequate viewing axes of the flapping wings for all pitch angles. Recordings of a high-speed camera pair were processed using a point tracking algorithm, allowing 136 points per wing to be measured...journal article 2020
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Natella, M. (author), De Breuker, R. (author)This paper discusses the effects of the aerodynamic model on the design of a composite wing via aeroelastic tailoring. The classic framework for analysis and optimization of composite wings developed at Delft University of Technology adopts panel method aerodynamics to calculate static and dynamic loads. The current work expands the...journal article 2019
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Camps Pons, Carlos (author)Transonic buffet is an aerodynamic instability that appears on aerofoils and wings at certain combinations of Mach number and angle of attack, and which limits the aircraft flight envelope. This thesis project presents an experimental<br/>investigation of buffet employing stereoscopic PIV and Background Oriented Schlieren. By using four...master thesis 2019
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Singh, Satish (author)Formation flying is a phenomenon observed very often in the natural world, e.g. birds flying in a flock. The past decade has given a lot of emphasis on the research for the control of autonomous Unmanned Aerial Vehicles (UAVs) of the fixed-wing kind, in an effort to emulate the behavior of natural flocks. Emulating this behavior requires the...master thesis 2019
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Rajpal, D. (author), Kassapoglou, C. (author), De Breuker, R. (author)An analytical model to predict the fatigue life of a composite laminate is formulated. The model calculates stresses in each ply using classical lamination theory, degrades the residual strength using the linear wear-out law and predicts failure based on Tsai Wu failure theory. The cycles to failure are predicted using the updated cycle-by...journal article 2019
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Groot, Roy (author)In early design stages of aircraft, component sizing is to a large extent based on semi empirical methods, which are generally lacking for unconventional aircraft configurations. This increases the uncertainty of the performances of the generated design, such as its stability and controllability. This work aims at using a more physics-based...master thesis 2019
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Narayanan, Anirudh (author)The goal of this study is to understand the processes and wing characteristics that influence lift generation of a flapping wing, and apply the acquired knowledge in an optimization setting to obtain an optimal wing thickness distribution which maximizes effective wing lift. To achieve this, an extensive literature survey was conducted to...master thesis 2019
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Heitzig, Dorian (author)This study investigates the wing deformation of the flapping-wing micro air vehicle (MAV) DelFly II in various flight configurations. Experiments were carried out with the MAV tethered in a windtunnel test section. To determine the best suited measurement approach, a trade-off study was carried out which showed that a point tracking approach...master thesis 2019
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Liebrand, Rens (author)Cavitating tip vortices of marine propellers are the main contributors to underwater radiated ship noise due to their dynamic behavior and broadband sound spectrum. Experimentally, it is challenging to get a detailed insight into the vortex structure which makes it difficult to understand the noise generating mechanisms. Although Computational...master thesis 2019