Searched for: mods_note_programme_s:"Flight%5C+Performance%5C+and%5C+Propulsion"
(1 - 20 of 62)

Pages

document
Mourão Bento, Hugo (author)
With the goal of decreasing the environmental impact of aircraft, ducted propellers emerge as an efficient propulsive alternative. Ducts are able to increase the thrust to power ratio of a propeller system by both producing thrust and/or lowering tip losses of propellers. In this thesis, RANS CFD simulations were used to analyse the possible...
master thesis 2019
document
Clar, Thibault (author)
With the global increase in passenger traffic and growing popularity of long-haul routes over the Asia Pacific region and Atlantic Ocean, the possibility for hypersonic transport could become an attractive option to reduce flight time over long distance from 16-20 hours down to around 4-5 hours. In this thesis, a Multi-Disciplinary Optimisation...
master thesis 2019
document
Ordoñez Celaya, David (author)
Pressure represents a physical magnitude which allows the characterisation of flow behaviour. Its study is
of great interest for engineering purposes and is broadly reported in the literature. The practical implementation of pressure measurements in industrial wind tunnel facilities involves the use of intrusive pressure probes only able to...
master thesis 2018
document
Dorca, Paul (author)
Damage tolerant designs are necessary for the continuous operation of aircraft engines which are subjected to harsh environmental influences during operation (e.g. large temperatures, foreign object damage of airfoils). One important aspect of damage tolerance is crack propagation which can be investigated via 3D numerical software. This Master...
master thesis 2018
document
Dumoulin, Thomas (author)
master thesis 2018
document
Tacconi, Jacopo (author)
Current unmanned aerial vehicles (UAVs) are limited in operating altitude and endurance by the maximum attainable performance of small gas turbine engines. While improvements in the cycle thermal efficiency can be obtained through the introduction of heat exchangers, the consequent increase in engine weight partially offsets the benefits gained...
master thesis 2018
document
Claeys, Mathias (author)
This paper is a representation of the research that has been performed with regards of the weight estimation of the Flying V and its conventional reference aircraft. The goal is to establish the feasibility of the Flying V as a structural concept. In order to do this a structural model of the Flying V has been created, as well as the design and...
master thesis 2018
document
Papp, David (author)
New generation combat aircraft are expected to operate over extended flight envelopes, including flight at high flow angles and rapid maneuvers. Conditions beyond traditional limits are giving rise to nonlinear phenomena, such as flow separation, large scale energetic vortices, fluctuations etc. These phenomena have significant impact on...
master thesis 2018
document
Liu, Xinyuan (author)
Increasing pressure of reducing fuel consumption has led to renewed interests in propeller propulsion devices for their high propulsive efficiency. In a propeller propulsion system, the torque applied to the propeller results in angular momentum in propeller slipstream. This angular momentum is not only a form of energy loss that does not...
master thesis 2018
document
Moreno Castan, Clara (author)
emissions, gas turbine manufacturers strive to attain higher thermal efficiency and specific work output in their engines. The enhancement of these two performance parameters is...
master thesis 2018
document
Schouten, Tom (author)
Designers are motivated to create more a efficient aircraft design following the growth of the market and environmental restrictions. As a result new interest in propeller-powered aircraft as such engines show higher theoretical propulsive efficiency as compared to turbofan engines.

The employment of turboprop engines on commercial...
master thesis 2018
document
Marcus, Pepijn (author)
The research objective is to analyze the aerodynamic interaction effects and quantify the performance of over-the-wing propeller systems. To achieve this objective, two wind tunnel experiments have been performed to characterize the most important aerodynamic interaction effects of a single propeller installed over-the-wing. Results feature wing...
master thesis 2018
document
Vazquez Bustelo, Jaime (author)
In the last ten years, the airlines are demanding lower aircraft prices and fuel consumption. Aircraft manufacturers as well as component and sub-assembly manufacturers are adapting to this situation by optimizing existing aircraft configurations. Traditional design processes, due to their inability to capture multidisciplinarity at the early...
master thesis 2018
document
Viguera Leza, Daniel (author)
The flow field subjected to the influence of the helicopter rotor is characterized by its three-dimensional pattern and unsteadiness. The accurate modeling of the flow around the rotor blades addressed by Computational Fluid Dynamics (CFD) simulations is associated with high computational costs. The complexity of the analysis can be reduced by...
master thesis 2018
document
Banerji, Sagarika (author)
With improvements in aviation technology, design requirements to be full-filled have also increased exponentially. This in turn influences the complexity of design process, along with the time and effort required for it. The problem, for this research, has been set up with respect to challenges faced at Fokker Aerostructures, during in-proposal...
master thesis 2018
document
van Mourik Broekman, Jeremy (author)
The high efficiency of open rotor propulsion has led to a comeback of propeller propulsion systems in recent years. The main issue preventing wide application of the technology is its high noise level. One of the main contributors to this noise is the pressure fluctuations generated during the interaction between a propeller tip vortex and a...
master thesis 2017
document
Klein, Peter (author)
As traditional fossil fuels become scarcer and more attention is given to environmental impact of the combustion of fossil fuels, for next-generation aircraft, the focus of development will mainly be on reducing fuel consumption. Open rotor engines have the advantage over conventional turbofans that they are expected to perform 25% to 30% better...
master thesis 2017
document
van Velden, Karel (author)
Airfoil optimizations require costly high-fidelity solvers. By replacing the expensive solver with a cheap to evaluate surrogate model genetic optimization becomes feasible and a global optimum can be obtained. This thesis investigates applicability of surrogate model based optimization for airfoil optimization and provides recommendations...
master thesis 2017
document
Sellés Alsedà, Dídac (author)
As technology advances, industry and academia rely more and more on the output of computer simulations or physical experiments of engineering systems under development. In some cases, the relationship between input and output of a system under study is too complex to model through analytical expressions or numerical methods. In other cases,...
master thesis 2017
document
Ketelaars, Martijn (author)
During aircraft design,multiple tools are utilised to inspect the performance of the configuration. As the design matures, higher fidelity analyses are conducted to predict the flight dynamics of the aircraft. These analyses are conducted by using semi-empirical relations, numerically analysing flow behaviour, conducting wind-tunnel tests and...
master thesis 2017
Searched for: mods_note_programme_s:"Flight%5C+Performance%5C+and%5C+Propulsion"
(1 - 20 of 62)

Pages