Searched for: subject%3A%22Tip%22
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Waasdorp, Britt (author)
Angiogenesis, i.e. the formation of blood vessels from existing ones, plays a vital role in bone or wound healing. The expansion of vascularization facilitates the healing process through the delivery of oxygen and nutrients to the injured site and through the removal of waste products. Clinical observations indicate that impaired angiogenesis...
master thesis 2024
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van Kan, Ferran (author)
A study is conducted on the effects of tip-mounted rotors on a conventional Darrieus H-VAWT; this study is complementary to the X-rotor concept proposal. This proposal features a novel offshore wind turbine concept that utilises blade-mounted tip rotors to extract energy from the flow. Following a literature study phase, an experimental campaign...
master thesis 2023
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Huang, Tzu-Yao (author)
Tip vortex cavitation around the marine propeller is the primary source of the underwater noises emitted by ships. Investigating the tip vortex inception is important to understand the aforementioned side effect. The water quality, highly related to the bubbles population, surrounding the tip vortex is crucial to the tip vortex cavitation...
master thesis 2022
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Pelle, Mathieu (author)
With the increasing number of wind farm projects, a growing interest is seen towards the extension of wind turbine durability and the optimisation of energy production. A promising technology in this direction, is the use of lidars for remote sensing of wind fields and particularly for lidar-assisted control of wind turbines. Many investigations...
master thesis 2022
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Cheekati, Vishnu (author)
In recent decades, high strength steels in thick sections have been increasingly used in offshore structures where they are subjected to harsh service conditions such as freezing temperatures and high static/dynamic loading. At these conditions they are susceptible to a transition from ductile failure to a dangerous brittle (cleavage)...
master thesis 2022
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de Jonge, Rinke (author)
The global population is growing rapidly, so the construction sector must keep up by increasing the number of houses and improving the infrastructure. The construction sector is importance to support economic growth and social development within society. However, the conflict that arises here is that the activities of the construction sector are...
master thesis 2022
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Goudswaard, Reinier (author)
The growing demand for efficient propulsion systems that operate primarily in hover, has led the ducted rotor configuration to emerge as an increasingly popular design solution. One of the major design parameters for the ducted-rotor assembly is the radial distance between the blade tip and the circumferential wall of the duct, referred to as...
master thesis 2021
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van Rijn, Sophie (author)
In the Netherlands, the frequency and severity of extreme rainfall events are expected to increase. This can result in severely detrimental effects. It is complicated for municipal actors to effectively manage these events, as it requires judgement on probabilities, costs, and uncertain impacts. As a result, obtaining scientific knowledge...
master thesis 2021
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Groen, Gijs-Bart (author)
Laparoscopy is a type of minimally invasive surgery in which instruments with long, slender shafts between handle and end effector are inserted through small incisions in the abdominal wall. A laparoscopic aspirator-irrigator (LAI) has a hollow shaft used to evacuate undesirable substances using a vacuum pressure, rinse tissue using a stream of...
master thesis 2021
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van der Leer, Quinty (author)
The current focus in the aviation industry for more sustainable designs, could mean the revive of propeller propulsion, due to their relative high propulsion efficiency compared to jets. In addition, the application of wingtip-mounted propellers installed in tractor configuration can be used as tip-vortex attenuating devices, reducing the wing...
master thesis 2021
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Doelman, Michiel (author)
Background: Accessing targets through complex trajectories with multiple curves in series, remains challenging today in many application fields, like surgery, the Fukushima disaster, maintenance of complex tube networks, mining and space operations. Current steerable devices require control of an extensive amount of segments, while moving as a...
master thesis 2021
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Willemsen, Roger (author)
Wingtip-mounted propellers have the ability to enhance the propeller-wing system performance. For inboard-up rotating tractor propellers, the swirl in the propeller slipstream can be used on the wing to reduce the influence of the wingtip vortex, decreasing drag. Furthermore, lift is enhanced by increasing dynamic pressure and angle of attack...
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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Varadharajan, Prasath Krishnaswamy (author)
A tip-vortex in the wake of a finite length lift generating surface has a low pressure region near the axis of the tip-vortex. This low pressure region can trigger tip-vortex cavitation especially in ship propellers which has adverse effects by causing vibration and underwater noise production. One way of minimising the tip-vortex cavitation is...
master thesis 2019
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James, Matthew (author)
Dynamic Atomic Force Microscopy (dAFM) is an extremely powerful tool for exploring surface topology and nanoscale manipulation and characterization. A feature of dAFM is the existence of highly nonlinear forces between a cantilever tip and sample. One of these forces that plays a large role in operation of AFM is the van der Waals (vdW) force....
master thesis 2019
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van den Boogaard, Maurits (author)
Tip vortex cavitation was previously identified as a source of the broadband noise emitted by ships underwater. This leads to unwanted noise and vibrations on board, which reduces passenger comfort, and increases the underwater signature of naval ships. The influence of different cavitation regimes on propellers and boundary layer transition on...
master thesis 2019
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Patel, Sonali (author)
The focus of this master thesis is to design a holistic solution to the problem of laparoscope lens tip contamination during the surgery while complying to the complex contextual factors. The stakeholder needs and the environment of the operating room were the key considerations during the design process.
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
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van der Graaf, Juriaan (author)
In cochlear implantation surgery, the appropriate placement of the electrode array into the cochlea is vital. Suboptimal placement of the electrode array may lead to reduced hearing performance and speech recognition after the surgery. Currently, there are methods to confirm the electrode position post-operatively (e.g. through a CT scan), but...
master thesis 2019
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van Duijn, Daan (author)
In recent years, more and more medical operations are done minimally invasive. Intervention radiology is a medical specialty which uses minimally invasive techniques to diagnose, or treat diseases. Instruments like needles and catheters are used by radiologists to enter the network of veins and arteries guided by image modalities. A complex...
master thesis 2019
Searched for: subject%3A%22Tip%22
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