Searched for: contributor:"van Oudheusden, Bas (mentor)"
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Bhardwaj, Shikhar (author)
Advancements in the semiconductor manufacturing processes, particularly photo-lithography, contribute to the sustainability goals of the modern society by enabling production of cheaper, more efficient computer chips. This thesis work focused on improvements to a technique called immersion lithography that uses a confined pool of liquid as the...
master thesis 2020
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Fernandez Barrio, Jorge (author)
A proportionate controller is investigated experimentally for unsteady load alleviation purposes on a 2D wing model with a trailing edge flap. This study is supposed to be a simplified version of a Smart Rotor, a mechanism which deals with the reduction of unsteady loads acting on a wind turbine and aims to understand the behavior of this type...
master thesis 2020
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Kessels, Fleur (author)
Recall that the first aim of this thesis was to assess whether we can derive bi-orthogonality relations demonstrating that the adjoint LST eigenvectors are orthogonal to the direct eigenvectors, for both the compressible and incompressible LST equations; thereby resolving the non-orthogonality complication. It is to that end that we derived the...
master thesis 2019
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Rietema, Roald (author)
Recent decades, an ongoing trend has emerged in the upscaling of wind turbines in order to compete with traditional energy resources. For conventional wind turbines, aside from improving safety, the driving factors for new designs have always been increased efficiency and performance. This has led to novel wind turbine designs comprising thin...
master thesis 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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De Voogt, Francis (author)
Stall is traditionally divided in three types of stall behaviour, these have been regarded as two dimensional and dominated by the airfoil shape. However one of these types of stall behaviour, trailing edge stall, has been shown in literature to be three dimensional by forming stall cells along the wing span. Stall cells are coherent flow...
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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Ujjaini Kempaiah, Kushal (author)
Reduction of skin-friction drag over a fully developed canonical zero-pressure gradient turbulent boundary layer (ZPGTBL) subjected to spanwise oscillation is measured using planar particle image velocimetry (PIV). The experiments are conducted at Re<sub>θ</sub> of 1000 and 1800, the chosen range of spanwise oscillations amplitude and frequency...
master thesis 2019
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Santiago Patterson, Jaime (author)
An experimental investigation on shock-shock interactions has been conducted with the aim of studying the transition between Regular (RI) and Mach interactions (MI) under the condition of variable inflow Mach number. The RI contains only oblique shocks while the MI has a quasi-normal shock segment, known as the Mach stem. MI configurations...
master thesis 2019
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Martinez Gallar, Blanca (author)
The aim of this investigation is to provide an experimental volumetric visualization of the near wake topology of the vortex structures generated by a flapping-wing Micro Air Vehicle (MAV) by means of large-scale Robotic PIV. This novel technique implements coaxial illumination and imaging in combination with the use of Helium Filled Soap...
master thesis 2019
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Risseeuw, Derek (author)
Flapping wings display complex flows which can be used to generate large lift forces. Flexibility in wings is widely used by natural flyers to increase the aerodynamic performance. The influence of wing flexibility on the flow can be computed using numerical analysis with Fluid Structure Interaction (FSI). However, there is a lack of open-source...
master thesis 2019
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Mertens, Christoph (author)
The boundary layer transition location is a crucial design parameter in aerodynamics. The computational prediction of boundary layer transition in engineering applications is typically based on empirical models. These models require experimental measurements for calibration and validation purposes. For unsteady aerodynamic processes, the range...
master thesis 2018
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Bagchi, Anamitra (author)
Bird flight has evolved to be highly efficient over a time span of a million years. Much of the evolution in flight of various birds is specialized to increase the flight performance of the bird in the adopted habitat. The bird flight in a macroscopic point of view has been a topic of research for a long time now. A few researchers in the past...
master thesis 2018
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Flinkerbusch, Arti (author)
This report discusses an investigation into the effect of a porous plate covering a cavity, on an oblique shock wave-boundary layer interaction. Four porous plates with different hole sizes and porosities, as well as a solid, 'dummy', plate, have been tested in a Mach 2 wind tunnel whereby an oblique shock wave (produced by a wedge) impinged on...
master thesis 2018
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Crespo Pradell, Oriol (author)
This master thesis focuses in the study of the application of active flow control in the transitional regime (Re ≈ 3E3) at the rear part of the roof of a 2D Ahmed body geometry. To do so, the natural bifurcations of the problem (which separate the ordered laminar behavior from the first pre-turbulent chaotic behavior) are studied, and different...
master thesis 2018
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Pronk, Emilie (author)
Oil and gas production systems consist of flows in wells, in horizontal and inclined flowlines and in risers. Due to the reservoir composition and changes in pressure and temperature, the flow is often under multiphase conditions. With time, the reservoir matures and the reservoir pressure decreases. The gas rate drops below a critical gas rate,...
master thesis 2017
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Payanda, Qais (author)
A combined PIV and Schlieren measurements have been carried out in the transonic-supersonic wind tunnel (TST-27) to investigate the effect of exhaust plume and the variation in nozzle length on the flow topology and mean pressure distribution on the wake of axisymmetric backward facing step model at freestream Mach numbers of 0.76 and 2.20,...
master thesis 2017
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van Weersch, Yorin (author)
Dimples are spherical indentations applied at a surface that have been found to yield a skin-friction drag reduction within a turbulent boundary layer. Shallow dimples have inherent advantages over traditional flow control techniques that require heavy active systems to be installed or pose maintenance problems. Proven drag-reducing mechanisms...
master thesis 2017
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Voogt, Nick (author)
In spaceflight, a launch vehicle is a rocket used to carry a payload from the Earth's surface into outer space. By traveling supersonically, launch vehicles are exposed to harsh environmental conditions during the various phases of operation. However, the most extreme operational conditions are encountered within the rocket engines themselves....
master thesis 2017
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Vester, Roeland (author)
A novel filtering method is implemented for the force measurements for typical flapping-wing measurement setups, taking into account the structural dynamics of the setup. With this filter, the temporal resolution of the usable signal is increased. Experiments are performed for surging and pitching wings, relevant for flapping wing flight, where...
master thesis 2017
Searched for: contributor:"van Oudheusden, Bas (mentor)"
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