Searched for: department:"Wind%5C Energy"
(1 - 20 of 292)

Pages

document
Mast, E.H.M. (author)
The aim of this study is to develop a method to identify the barriers to and opportunities in the development of large-scale offshore wind energy in the Netherlands, taking into account the uncertainties of the future and consequences of decisions, from technological, economical, social, political and environmental perspectives. The research...
doctoral thesis 2014
document
Haans, W. (author)
doctoral thesis 2011
document
Schepers, J.G. (author)
The subject of aerodynamics is of major importance for the successful deployment of wind energy. As a matter of fact there are two aerodynamic areas in the wind energy technology: Rotor aerodynamics and wind farm aerodynamics. The first subject considers the flow around the rotor and the second subject considers the (wake) flow within a wind...
doctoral thesis 2012
document
Sathe, A.R. (author), Courtney, M. (author), Mann, J. (author), Wagner, R. (author)
This article describes some preliminary efforts within the SafeWind project, aimed to identify the possible added value of using wind lidars to detect extreme wind events. Exceptionally good performance is now regularly reported in the measurement of the mean wind speed with some wind lidars in flat terrain. For turbulence measurements, recent...
conference paper 2011
document
Sathe, A.R. (author)
Variations in wind conditions influence the loads on wind turbines significantly. In order to determine these loads it is important that the external conditions are well understood. Wind lidars are well developed nowadays to measure wind profiles upwards from the surface. But how turbulence can be measured using lidars has not yet been...
doctoral thesis 2012
document
Grete, C. (author)
The fundamental working principle of kite power generation is straightforward: a fast-flying kite pulls a tether from a drum, which drives a generator. At the maximum reel-out length, the kite is de-powered and pulled back, to initiate a new pumping cycle. The objective of this innovative technology is to make electricity generation affordable,...
journal article 2014
document
Schmehl, R. (author)
Airborne wind energy is an emerging field in the renewable energy technologies that aims to replace the use of fossil fuels for energy production on an economical basis. A characteristic feature of the various concepts that are currently pursued is the use of tethered flying devices to access wind energy at higher altitudes where the wind is...
book 2015
document
Barlas, A. (author)
This thesis investigates particular concepts and technologies that can alleviate fatigue loads on wind turbines by using distributed active aerodynamic devices on the blades, a concept briefly referred to as `smart blades'. Firstly, published research work on smart control devices is reviewed, and the pros and cons for the application on wind...
doctoral thesis 2011
document
Chen, L. (author)
doctoral thesis 2015
document
Zhu, Z. (author), La Rocca, G. (author), Van Tooren, M.J.L. (author)
Harness 3D routing in aircraft Electrical Wiring Interconnection System (EWIS) design is very complex because of both the intrinsic complexity of EWIS and the increasing number of design constraints. The complexity hinders the improvement of the design efficiency and makes the design error prone. Considering that many harness components are...
conference paper 2015
document
Cheng, L. (author), Mattei, S. (author), Fick, P.W. (author), Hulshoff, S.J. (author)
A semi-continuous formulation is introduced for finding bases which minimise the error in a specific output functional of a reduced-order model. The formulation is advantageous in that it can be easily applied to nonlinear problems and functionals. A general description of the approach is given, then explicit formulations are derived for the...
conference paper 2014
document
Sciacchitano, A. (author), Dwight, R.P. (author), Scarano, F. (author)
Velocity measurements conducted with particle image velocimetry (PIV) often exhibit regions where the flow motion cannot be evaluated. The principal reasons for this are the absence of seeding particles or limited optical access for illumination or imaging. Additional causes can be laser light reflections and unwanted out-of-focus effects. As a...
conference paper 2012
document
Ashuri, T. (author), Van Bussel, G.J.W. (author), Zaayer, M.B. (author), Van Kuik, G.A.M. (author)
A wind turbine blade has a complex shape and consists of different elements with dissimilar material properties. To do any aeroelastic simulation, the structural properties of the blade such as stiffnesses and mass per unit length should be known in advance, and extracting these properties is a difficult task. This paper presents an analytical...
conference paper 2010
document
Lynch, K. (author), Scarano, F. (author)
A tomographic PIV system composed of a large number of cameras is used to experimentally investigate the relation between image particle density, number of cameras and the reconstruction quality. The large number of cameras allows to determine an asymptotic behavior for the object reconstruction over a wide range of values for the tracer...
conference paper 2013
document
Schroijen, M.J.T. (author), Van Tooren, M.J.L. (author)
Environmental issues play an increasingly important role in aviation, affecting the desirability of novel technologies directly. The desirability of a certain technology with respect to environmental issues is determined by the system of systems level impact instead of the often used system level impact. Changing this perspective introduces...
conference paper 2010
document
Schrijer, F.F.J. (author), Caljouw, R. (author), Scarano, F. (author), Van Oudheusden, B.W. (author)
The flow over a 15?-45? double compression ramp was studied at Mach 7.5. CFD computations are compared to 2 component PIV (particle image velocimetry) measurements. Furthermore stereoscopic PIV was used to measure the three component velocity vector, enabling to perform a 3D flow survey. The overall flow topology is assessed and special...
journal article
document
Jonkers, H.L. (author)
doctoral thesis 1976
document
Vos, R. (author), Barrett, R. (author)
A new type of adaptive structure is presented that relies on a pressure derential to perform gross structural deformations. This structure relies on highly compliant honey-comb cells that can be pressurized externally or can rely on a pressure differential that exists at elevated altitudes. By pressurizing this honeycomb, its stiffness can be...
conference paper 2010
document
Sun, Z. (author)
The micro vortex generator (MVG) is used extensively in low speed aerodynamic problems and is now extended into the supersonic flow regime to solve undesired flow features that are associated with shock wave boundary layer interactions (SWBLI) such as flow separation and associated unsteadiness of the interaction system. Numerous experimental...
doctoral thesis 2014
document
Kähler, C.J. (author), Cierpka, C. (author), Scharnowski, S. (author), Manhart, M. (author), Sciacchitano, A. (author), Lynch, K. (author), Scarano, F. (author), Wieneke, B. (author), Willert, C. (author), Jeon, Y. J. (author), Chatellier, L. (author), Augereau, L. (author), Tremblais, B. (author), David, L. (author)
Classical Particle Image Velocimetry (PIV) uses two representations of the particle image distribution to determine the displacement of the particle image pattern by spatial cross-correlation. The accuracy and the robustness are however limited by the fact that only two representations at t and t +?t are present. Thus, only a first order...
conference paper 2013
Searched for: department:"Wind%5C Energy"
(1 - 20 of 292)

Pages