Searched for: contributor%3A%22Timmer%2C+W.A.+%28mentor%29%22
(1 - 20 of 21)

Pages

List view
Grid view
document
Lopez Pernas, Pedro (author)
Aviation is responsible for a large part of the emissions due to transportation, which is why, in recent years, a trend towards implementing sustainability in aviation has emerged. In small aircraft, the concept of Leading-Edge Distributed Propulsion (LEDP) can provide aerodynamic advantages to reduce fuel consumption thanks to the ability to...
master thesis 2022
document
Wildvank, Ragiel (author)
The EU has committed itself to reduce the greenhouse gas emissions with 20% by 2020 with respect to the 1990 level. This means that all industry sectors including the transport sector have to become more energy efficient. The long and short haul trucks are, with 4.95% of the total CO2 equivalent emissions, a major contributor in the transport...
master thesis 2018
document
Hoogendoorn, Marijn (author)
To limit the threat posed by global climate change it is vital to reduce the emissions of the transport sector in the short term. Two existing aerodynamic add-on devices for the rear-end of a heavy duty vehicle, a tail and guide vanes, are combined in an attempt to achieve a larger drag reduction. A research is performed using numerical...
master thesis 2018
document
Veraart, Marijn (author)
master thesis 2017
document
Van Den Kieboom, B. (author)
master thesis 2017
document
Ubbens, H.H. (author)
Bobsleighing is one of the fastest winter sports and races are decided within seconds over total times up to four minutes. Therefore marginal gains in performance of the bobsleigh and its crew can determine the race outcome. In order to improve the performance of a bobsleigh the aerodynamic drag can be investigated. A bobsleigh consists of two...
master thesis 2016
document
Stam, C.J. (author)
Vortex generators (VGs) are effectively used to improve the performance of the wind turbine blades by means of flow control. VGs can be represented by local geometrical disturbance on the aerodynamic surfaces. This disturbance generates vortices in the streamwise direction, energizing the boundary layer and hence delaying or suppressing the flow...
master thesis 2016
document
Spranger, L.L.C.C. (author)
As on-shore wind farms are being installed in colder and harsher climatic areas in increasing numbers, it becomes more and more important to have adequate measures for dealing with rotor blade icing. Rotor blade icing can lead to a number of serious consequences for the safety, power production, and operation of a wind turbine or entire wind...
master thesis 2016
document
Dijkstra, Pieter (author)
The thesis is focused on designing a tip-region airfoil for a multi-MW wind turbine. It is approached with the objective of optimizing the geometry of the airfoil for the best trade-off between aero-acoustics and aerodynamic requirements. Using the wind turbine noise prediction tool SILANT it is established that trailing edge noise is the most...
master thesis 2015
document
Ramirez Gutierrez, C.A. (author)
A large number of wind energy installations exist on rich wind resource sites. Nevertheless, estimates show that about 50% of the world’s wind energy resource has a wind speed of 7 m/s or less. For these low wind speed resource areas, low wind turbine technology is required. For this reason, this DTU Wind Energy master project, in cooperation...
master thesis 2014
document
Gashaw, Eyob (author)
Given the prime importance of wind tunnel setup when it comes to aero-elastic study, the main intent of this project is to devise a mechanism for supporting system of 2D aero-elasticity experiment in the Red Wind Tunnel Facility at DTU that allows three-degree-of-freedom motion of the rigid model. This project work is mainly inspired by the fact...
master thesis 2014
document
Franca, B.M.R. (author)
In recent years the global demand for sustainable energy has risen. In search of new sustainable energy sources, Delft University of Technology’s KitePower group developed an airborne wind energy system. This system is based on a pumping cycle principle where a kite is reeled out with high traction forces while turning a generator, and reeled...
master thesis 2014
document
Velez Isaza, A. (author)
The process of designing a wind turbine blade involves many disciplines and is of an iterative character, making it cumbersome and sometimes inefficient. In this thesis an increased understanding of the physical and modeling considerations required for a better aero-elastic design of a blade is sought. To this end, an aero-structural model is...
master thesis 2012
document
Bos, R. (author)
Like many vertical-axis wind turbines (vawts) of the Darrieus type, Turby fails to achieve a fully passive start-up. Experiments indicate that there is a band of negative torque—often referred to as dead band in literature—somewhere in the tip speed range 0.5 B l B 1.6. The reason behind this is that, unfortunately, the power coefficient...
master thesis 2012
document
Hosman, N. (author)
In rural areas of Mali people depend on off-grid gasoline generators for the supply of electricity. Due to the import of expensive gasoline, electricity prices are very high and only few people can afford it. To make electricity cheaper and to stimulate the local economy, local renewable energy sources could be the solution. Due to the use of...
master thesis 2012
document
de Oliveira, G. (author)
Actiflow is designing a new generation of wind turbine rotors enhanced by the use of passively powered boundary layer suction to improve the aerodynamic and struc­tural performance of thick profiles. As a part of this effort, this work explores the design space of airfoils with(out) boundary layer suction, outlines major design trends and...
master thesis 2011
document
Landstra, F.W. (author)
Wind engineering is becoming an increasingly important field of research. The pursuit for larger and more efficient wind turbines make the accurate prediction of forces and moments on turbine blades evermore crucial. During wind turbine starts and stops the turbine blades are subjected to large angles of attack. At these large angles the flow...
master thesis 2010
document
Trips, Dennis (author)
This thesis focuses on the development of an aerodynamic optimization algorithm for long range mini-UAV’s. This algorithm is applied to the design of the TU Delft mini- UAV that participated in the EMAV2009 outdoor endurance mission. The analysis of the low Reynolds number (< 2.5 · 105) aerodynamics on the wing is performed using a quasi-3D...
master thesis 2010
document
Zwang, L. (author)
master thesis 2009
document
Bink, J. (author)
Wind tunnels are used to study airflows around objects like cars, airplanes and ice-skaters. This is done, simulating the real world, by blowing an airflow over a fixed body. In the real situation an object moves through the air, while in a wind tunnel it is the air that is moving. So a wind tunnel needs to generate an airflow. In this airflow,...
master thesis 2008
Searched for: contributor%3A%22Timmer%2C+W.A.+%28mentor%29%22
(1 - 20 of 21)

Pages

List view
Grid view