Searched for: subject%3A%22Airfoil%22
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Janoff, Philipp (author)
Leading edge roughness is an important challenge for the wind energy industry as blades are permanently exposed to the damaging impacts of the environment. The contamination due to impact of insects, ice accretion and dust; as well as the erosion of the blade due to rain, debris and abrasive airborne particles increase roughness upon the surface...
master thesis 2023
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Bouman, Naomi (author)
Airborne wind energy systems offer a promising approach for renewable energy generation. However, the noise emissions associated with these systems should be understood and minimized as well to promote their integration and (social) acceptance. This research aims to identify the noise sources of airborne wind energy systems, systems with leading...
master thesis 2023
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Porta i Ko, Agustí (author)
Airborne wind energy (AWE) systems benefit from a high lift airfoil to increase the power output, to that end, multi-element airfoils are investigated for AWE applications. This thesis aims to optimize a multi-element airfoil for a rigid AWE kite that operates in a pumping cycle. Since the kite has distinct operational phases, i.e., reel-out and...
master thesis 2022
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Kakkar, Samarth (author)
The main objective of this thesis was to explore the capabilities of neural networks in terms of representing governing differential equations, primarily in the purview of fluid/aero dynamic flows. The governing differential equations were accommodated within the loss functions for training the neural networks, thereby making them 'physics...
master thesis 2022
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Huang, Dobbin (author)
Physics-informed machine learning is a novel approach to solving flow problems with physics-informed neural networks (PINNs), that combines physical knowledge and machine learning.<br/>This study aims to investigate the potential of the application of PINNs in fluid mechanics problems by solving two practical flow problems.<br/><br/>The first...
master thesis 2022
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Ravi Ramesh, Ravi (author)
Airfoils in deep stall have been a subject of extensive computational discussion in the past, with multiple efforts being performed by various institutions to test their solvers and turbulence/hybrid sub-grid scale (SGS) models for their use in massively separated flows. This case has an important application in turbomachinery where unsteady...
master thesis 2021
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Geuens, C.S.E. (author)
Direct design optimisation methods for turbomachinery blades have consistently gained in popularity over time. This has been accomplished by significant advances in optimisation algorithms, and notably the development of adjoint-based gradient computation, which provides objective sensitivity information at comparatively low computational cost....
master thesis 2020
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Mazza, Piero (author)
This work follows the wind energy airfoil probabilistic design approach that allows to derive a probability density function which gives an estimation of how much the angle of attack is likely to fluctuate, according to the considered non-uniform perturbations in the wind speed. Several combinations of the perturbation sources are possible in...
master thesis 2020
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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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van Pelt, Pieter (author)
The Kutta condition is a boundary condition applied at a wing’s trailing edge (TE), which enables the calculation of the fluid-dynamic lift produced by a wing in potential flow. This condition is actually a stable equilibrium resulting from a transient flow. The main question of this research is: how is the Kutta condition flow-field created...
master thesis 2019
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Mangano, Marco (author)
The second-generation of supersonic civil transport has to match ambitious targets in terms of noise reduction and efficiency to become economically and environmentally viable. High-fidelity numerical optimization offers a powerful approach to address the complex trade-offs intrinsic to this novel configuration. Past and current research however...
master thesis 2019
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Mayer, Jonathan (author)
For many aerospace applications, the dominant airfoil self-noise source is Turbulent Boundary Layer Trailing Edge (TBL-TE) noise. The replacement of solid airfoil trailing edges with permeable materials proved to be an adequate noise reduction mean in previous studies. This thesis project contributes to the development of innovative permeable...
master thesis 2019
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Coenen, Roger (author)
Airborne Wind Energy is a technology where wind energy is harvested with tethered flying devices. Kitepower uses flexible leading edge inflatable kites, but these have a scaling disadvantage in that they become heavier with size. A single skin kite has the potential of negating this disadvantage while at the same time being more aerodynamically...
master thesis 2018
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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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Kroon, Erik (author)
A new field of study has arisen within Wind Energy known as ‘Airborne Wind Energy’ (AWE). Although the concept of AWE has been around for a long time, there has been little development in this field until recently. This thesis adds to this development.<br/><br/>The focus lies on airfoil design in order to improve existing AWE systems and...
master thesis 2018
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Boohalli Shivamallegowda, Greeshma (author)
Airfoil design plays an important role in improving the performance of Vertical Axis Wind Turbines(VAWTs). The aim of this thesis is to arrive at optimal airfoil geometries to enhance the performance of VAWTs and analyse the performance of these optimal airfoils under steady and unsteady operation conditions of the rotor. The airfoil design is...
master thesis 2018
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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
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Van Craenenbroeck, J. (author)
High lift systems are indispensable but complex and heavy systems so new methods to allow lighter and simpler high lift systems are actively sought after. One of the methods that have already proven to be able to increase high lift performance is boundary layer suction. In practice however the application of it is uncommon mainly due to the...
master thesis 2016
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Bruining, A. (author)
student report 1979
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