Searched for: mods_note_programme_s%3A%22Aerospace%255C+Engineering%255C+%257C%255C+Flight%255C+Performance%255C+and%255C+Propulsion%22
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Ordoñez Celaya, David (author)Pressure represents a physical magnitude which allows the characterisation of flow behaviour. Its study is<br/>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
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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
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Zondag, Martijn (author)With increasing fuel prices, airlines are searching for means to reduce fuel consumption. Due to the limited variables that operators can influence of an aircraft, they are left with only operational changes, such as center of gravity positioning. By shifting the center of gravity aft, achieved by loading heavy cargo and baggage in the rear,...master thesis 2018
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- Dumoulin, Thomas (author) master thesis 2018
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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
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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
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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
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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
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Moreno Castan, Clara (author)As a response to a socio-economic framework which demands lower fuel consumption and CO<sub>2</sub> 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
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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. <br/><br/>The employment of turboprop engines on commercial...master thesis 2018
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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
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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
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Torre, Francesco (author)Turbopumps are used in large-scale liquid rockets to inject the cryogenic propellants into the combustor. The turbopumps operate at high rotational speed, which in turn leads to cavitation at the inlet of the impeller. Cavitation can cause performance issues, instabilities and mechanical damage of the blades.<br/>This thesis presents and...master thesis 2018
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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
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Mingardo, Giacomo (author)The threat of global warming made the increase of efficiency a crucial objective for future power plants and aero engines. As secondary flow is a major source of aerodynamic losses in turbines, its mitigation is critical to enable efficient designs. However, the suppression of secondary flow formation is challenging due to the complexity of the...master thesis 2018
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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
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Aggarwal, Shivang (author)One of the key components of the nuclear reactor is the reactor pressure vessel (RPV), and its integrity is critical for the safety of the nuclear reactor. Lifetime extension of RPV project deals with the different issues which pose threat to its integrity. One such important issue is the occurrence of pressurised thermal shock (PTS). The most...master thesis 2017
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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
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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
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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
Searched for: mods_note_programme_s%3A%22Aerospace%255C+Engineering%255C+%257C%255C+Flight%255C+Performance%255C+and%255C+Propulsion%22
(41 - 60 of 63)