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Sarma, R. (author)
The growing demand for energy worldwide has resulted in the exploration and<br/>development of sustainable forms of energy, such as wind energy. Wind turbines<br/>are typically used to extract power from the wind through the rotational motion<br/>of blades, which are aeroelastic structures. Among other practical examples, aircraft wings are also...
doctoral thesis 2018
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Florentie, L. (author)
Vortex generators (VGs) are awidespread means of passive flowcontrol, capable of yielding significant performance improvements to lift-generating surfaces (e.g. wind-turbine blades and airplane wings), by delaying boundary-layer separation. These small vanetype structures, which are typically arranged in arrays, trigger the formation of small...
doctoral thesis 2018
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Cheng, L. (author)
Modern computational and experimental techniques can represent the detailed dynamics of complex systems using large numbers of degrees of freedom. To facilitate human interpretation or the optimal design of control systems, however, reduced-order models (ROMs) are required. Conventional reduced-order modeling techniques, such as those based on...
doctoral thesis 2017
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van Rooij, A.C.L.M. (author)
Aerodynamic non-linearities, such as shock waves, boundary layer separation or boundary layer transition, may cause an amplitude limitation of the oscillations induced by the fluid flow around a structure. These aeroelastic limit-cycle oscillations (LCOs) resulting from aerodynamic non-linearities have been studied numerically in this PhD thesis...
doctoral thesis 2017
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van der Velden, W.C.P. (author)
doctoral thesis 2017
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Blom, D.S. (author)
Fluid-structure interaction simulations are crucial for many engineering problems. For example, the blood flow around new heart valves or the deployment of airbags during a car crash are often modeled with fluidstructure interaction simulations. Also, to design safe parachutes, simulations are carried out to model the unsteady deformations of...
doctoral thesis 2017
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Mehta, D. (author)
This thesis concerns the industrial application of large eddy simulation to wind farm aerodynamics. Through a series of simple tests, it presents the pros and cons of using energy-conserving time integration and furthers the importance of a dissipation-free spatial discretisation. Finally, it demonstrates the capability of the Energy-Conserving...
doctoral thesis 2016
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Azijli, I. (author)
doctoral thesis 2016
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Gillebaart, T. (author)
One of the solutions to speed up the energy transition is the smart rotor concept: wind turbine blades with actively controlled Trailing Edge Flaps. In the past decade feasibility studies (both numerical and experimental) have been performed to assess the applicability of smart rotors in future design strategies and the next step is the...
doctoral thesis 2016
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Deng, S. (author)
The interest in Micro Air Vehicles (MAVs) has stimulated continuous research activities, in view of their potential in civilian and military applications. An autonomous MAV with dedicated onboard sensors would be capable of executing mission in closed environments, such as surveillance, in door inspection in support of rescue operations and...
doctoral thesis 2016
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Chen, L. (author)
doctoral thesis 2015
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Scholcz, T.P. (author)
The cost and turnaround time of the load calculation cycle in the design process of aircraft can be reduced by developing new numerical simulation technologies aimed at efficient prediction of steady and unsteady force coefficients in the flight envelope. In order to capture the most extreme stress levels due to gust and manoeuvres, efficient...
doctoral thesis 2015
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Edeling, W.N. (author)
The goal of this thesis is to make predictive simulations with Reynolds-Averaged Navier-Stokes (RANS) turbulence models, i.e. simulations with a systematic treatment of model and data uncertainties and their propagation through a computational model to produce predictions of quantities of interest with quantified uncertainty. To do so, we make...
doctoral thesis 2015
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De Baar, J.H.S. (author)
Both measurements and computer simulations of fluids introduce a prediction problem. A Particle Image Velocimetry (PIV) measurement of a flow field results in a discrete grid of velocity vectors, from which we aim to predict the velocity field or related quantities. In Computational Fluid Dynamics (CFD), the output of the computer code depends...
doctoral thesis 2014
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Sterenborg, J.J.H.M. (author)
For wind turbines there is need for accurate fluid-structure interaction predictions due to among others increasing wind turbine blade length and the design of load alleviation systems based on aero-elastic blade deformations, like bend-twist coupling. Currently, engineering models are widely used to simulate fluid-structure interactions for...
doctoral thesis 2014
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Kreeft, J.J. (author)
doctoral thesis 2013
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Kazemi Kamyab, V. (author)
Time-accurate simulations of the thermal interaction of flows and structures, also referred to as conjugate heat transfer (CHT), can be computationally expensive. Furthermore, given the multi-physics nature of many engineering problems, resolution of other coupled phenomena, in addition to CHT, may also be of interest. This thesis aimed at...
doctoral thesis 2013
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Palha, A. (author)
doctoral thesis 2013
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De Jong, A.T. (author)
doctoral thesis 2012
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Lucas, P. (author)
Over the last four decades the increase in computer power and the advances in solver technology has resulted in an estimated reduction of 10 orders in magnitude to compute flow problems. However, to solve the instationairy Reynolds-averaged Navier-Stokes equations, even today, a massive amount of CPU time may be required. For example, to solve...
doctoral thesis 2010
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