Searched for: department%3A%22Aerodynamics%252C%255C+Wind%255C+Energy%255C+%2526%255C+Propulsion%22
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Gentile, V. (author), Schrijer, F.F.J. (author), Van Oudheusden, B.W. (author), Scarano, F. (author)
Stereoscopic Particle Image Velocimetry (PIV) was used to study the wake of an ogive-cylinder with after-body at a diameter-based Reynolds number ReD = 6.7 · 104. The vertical fluctuations reduced from a maximum of 0.18 U? in absence of rear-protrusion, up to 0.12 U? and 0.1 U? when the main-body to after- body diameter ratio d/D was increased...
conference paper 2015
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Geurts, B.M. (author), Simao Ferreira, C. (author), Van Bussel, G.J.W. (author)
Wind energy in the urban environment faces complex and often unfavorable wind conditions. High turbulence, lower average wind velocities and rapid changes in the wind direction are common phenomena in the complex built environments. A possible way to improve the cost-efficiency of urban wind turbines is the application of flowenhancing...
conference paper 2010
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Bochev, P. (author), Gerritsma, M.I. (author)
We present a spectral mimetic least-squares method which is fully conservative and decouples the primal and dual variables.
conference paper 2014
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Mulder, B. (author), La Rocca, G. (author), Schut, J. (author), Verhagen, W.J.C. (author)
A short lead time of the Product Development Process (PDP) is an important competitive advantage for companies. Design automation solutions provide a means to reduce the lead time and improve quality, but their development requires some investment. Before a company can commit to the development of an automation initiative, it requires an...
conference paper 2015
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Blinde, P.L. (author), Schrijer, F.F.J. (author), Powell, S.J. (author), Werner, R.M. (author), Van Oudheusden, B.W. (author)
A wind tunnel model containing a solid rocket motor was tested at Mach 2 to assess the feasibility of investigating the interaction between a hot plume and a high-speed outer stream. In addition to Schlieren visualisation, the feasibility of applying PIV was explored. Recorded particle images revealed that the hot plume scatters and reflects...
conference paper 2015
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Giyanani, A.H. (author), Bierbooms, W.A.A.M. (author), Van Bussel, G.J.W. (author)
Remote sensing of the atmospheric variables with the use of LiDAR is a relatively new technology field for wind resource assessment in wind energy. The validation of LiDAR measurements and comparisons is of high importance for further applications of the data.
conference paper 2015
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Sinnige, T. (author), Malgoezar, A.M.N. (author), Ragni, D. (author), Snellen, M. (author), Eitelberg, G. (author), Veldhuis, L.L.M. (author)
An experimental investigation was performed at the Large Low-speed Facility of the German-Dutch wind tunnels (DNW-LLF) to study the pylon interactions associated with pusher propellers. The aerodynamic and aeroacoustic effects of pylon trailing edge blowing and swirl recovery vanes (SRVs) were evaluated. The pylon installation increased the...
conference paper 2015
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Kotsonis, M. (author), Giepman, R. (author), Veldhuis, L.L.M. (author)
A numerical investigation on the use of plasma actuators for transition control is presented. The numerical framework involves the solution of the full unsteady 2D incompressible Navier Stokes equations using a finite volume formulation. The set of equations is formulated by solving for the perturbations in the flow while a mean laminar boundary...
conference paper 2011
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Chen, L. (author), Maher, G.D. (author), Hulshoff, S.J. (author)
Parameters for SGS models within the variational multiscale method for the Stokes equations are determined using two different methods. Both linear and nonlinear models are considered. Firstly, optimal parameters are found using a goal-oriented model-constrained technique minimising L2 error. Secondly, parameters are obtained using the...
conference paper 2014
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Baldacchino, D. (author), Ragni, D. (author), Simao Ferreira, C.J. (author), Van Bussel, G.J.W. (author)
In this work, the measured modulated integral boundary layer (IBL) characteristics of low-profile vortex generators (VGs) are used to validate new developments in a viscousinviscid interaction code which is modified to incorporate the effect of the passive mixing devices. The motivations are laid out and sample validation data is presented...
conference paper 2015
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Van der Velden, W.C.P. (author), Van Zuijlen, A.H. (author), De Jong, A.T. (author), Bijl, H. (author)
A Large Eddy Simulation (LES) with four different closure models are analyzed in OpenFOAM, an open source Computional Fluid Dynamics (CFD) package and validated for the determination of the streamwise and spanwise coherence length of the pressure field below a turbulent boundary layer at low Reynolds numbers. Matching results are found for outer...
conference paper 2014
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Straathof, M.H. (author), Van Tooren, M.J.L. (author), Voskuijl, M. (author), Vos, R. (author)
A new parametrization method for aircraft shapes is presented to enhance shape optimization for aircraft design. This parametrization method was implemented in a tool that creates feasible initial solutions for multidisciplinary design optimization problems. The tool combines all aspects of the aerodynamic design process: parametrization, aero...
conference paper 2010
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Zhu, Z. (author), Van Tooren, M.J.L. (author), La Rocca, G. (author)
Wire harness design is an increasingly complex task. Knowledge Based Engineering (KBE) and optimization techniques can be used to support designers in handling this complexity. The wire harness design process can be divided in three main parts, namely electrical design, configuration design and geometrical routing. This paper describes the...
conference paper 2012
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Avallone, F. (author), Correale, G. (author)
An experimental investigation was conducted on the effective efficiency of a nanosecond Dielectric Barrier Discharge (ns-DBD) plasma actuator. Back-current shunt technique and infrared thermography measurements were carried out at the same time on an upside-down flat plate in a quiescent environment. The only investigated parameter was thickness...
conference paper 2015
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Hoogreef, M.F.M. (author), D'Ippolito, R. (author), Augustinus, R. (author), La Rocca, G. (author)
This paper presents the status of development of an MDO advisory system, coupled to an optimization configurator for a process integration and design optimization (PIDO) system. This advisory system can support non-experts in the application of MDO by giving advice on the type of MDO architecture to use and assist in the implementation of the...
conference paper 2015
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Tenaglia, A. (author), Persin, M. (author), Van Oudheusden, B.W. (author), Deng, S. (author), Remes, B. (author)
This paper addresses the unsteady aerodynamic mechanisms in the hovering flight of the DelFly II flapping-wing Micro Aerial Vehicle (MAV). Stereoscopic Particle Image Velocimetry (Stereo-PIV) were carried out around the wings at a high framing rate. Thrust-force was measured to investigate the relation between the vortex dynamics and the...
conference paper 2014
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Sathe, A.R. (author)
The statistics of atmospheric stability and non-dimensional wind profiles are studied using the standard surface-layer theory at Egmond aan Zee in the North Sea. Measurements at 21, 70 and 116 m are used to validate the theoretical profiles. Charnock’s relation is used to estimate the sea surface roughness. Bulk Richardson number is used to...
conference paper 2010
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Schrijer, F.F.J. (author), Walpot, L.M.G.F.M. (author)
The wake behind an Apollo shaped capsule is investigated in the framework of the ’afterbody heating’ topic in the RTO WG043 working group. Measurements are performed by means of schlieren, shadowgraphy and stereo particle image velocimetry (SPIV) and are used for CFD validation purposes. The model geometry is a scaled version of the AS-202. It...
conference paper 2010
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Deng, S. (author), Van Oudheusden, B.W. (author), Remes, B.D.W. (author), Persin, M. (author), Bijl, H. (author), Ruijsink, H.M. (author)
conference paper 2013
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Hoogreef, M.F.M. (author), La Rocca, G. (author)
Multidisciplinary Design Optimization (MDO) can aid designers to improve already mature design solutions, as well as to explore innovative, complex engineering products. It is a methodology, complete with mathematical formulations, that assists in the optimization of a complex product, whilst considering and exploiting discipline interactions....
conference paper 2015
Searched for: department%3A%22Aerodynamics%252C%255C+Wind%255C+Energy%255C+%2526%255C+Propulsion%22
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