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Van der Velden, W.C.P. (author), Van Zuijlen, A.H. (author), De Jong, A.T. (author), Bijl, H. (author)
The flow around a beveled flat plate model with an asymmetric 25 degrees trailing edge with three rounding radii is analyzed using a Navier-Stokes based open source software package OpenFOAM in order to predict the aeroacoustic properties of the models. A Large Eddy Simulation with a dynamic Smagorinsky and implicit model are used as closure...
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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De Jong, P.M.A. (author)
During today’s aircraft descents, Air Traf?c Control (ATC) commands aircraft to descend to specific altitudes and directions to maintain separation and spacing from other aircraft. When the aircraft is instructed to maintain an intermediate descent altitude, it requires engine thrust to maintain speed, leading to increased fuel burn and noise...
doctoral thesis 2014
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De Jong, A.T. (author)
doctoral thesis 2012
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De Jong, P.M.A. (author), De Vos, K. (author), Borst, C. (author), Van Paassen, M.M. (author), Mulder, M. (author)
Two of the major projects in ATM development, SESAR and NextGen, both fore- cast the use of 4D trajectories as an intermediate phase in the development of full Performance Based Trajectories. Using 4D trajectories, the full positional and time coordinates of the aircraft are known throughout the planned trajectory. During approach, when reduced...
conference paper 2011
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In 't Veld, A.C. (author), De Jong, P.M.A. (author), Van Paassen, M.M. (author), Mulder, M. (author)
Wind is one of the major contributors to uncertainty in continuous descent approach operations. Especially when aircraft that are flying low or idle thrust approaches are issued a required time of arrival over the runway threshold, as is foreseen in some of the future ATC scenarios, the on-board availability of both dependable and accurate wind...
conference paper 2011
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Sopjes, R. (author), De Jong, P.M.A. (author), Borst, C. (author), Van Paassen, M.M. (author), Mulder, M. (author)
In order to reduce noise nuisance around Schiphol Airport, a Continuous Descent Approach procedure was introduced in the late ’90s. Unfortunately, because unpredictable individual aircraft behavior lead to increased landing intervals for this procedure, it is currently only applied during night time operations. Time-of-Arrival control in the...
conference paper 2011
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De Jong, A.T. (author), Bijl, H. (author), Scarano, F. (author)
The present investigation focuses on the aero-acoustic resonance of cavities with a width much larger than their length or depth and partially covered, as often encountered in automotive door gaps. The cavities are under influence of a low Mach number flow with a relatively thick boundary layer. Under certain conditions, these cavities can...
journal article 2011
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De Jong, A.T. (author), Bijl, H. (author)
Cavity aeroacoustic noise is relevant for aerospace and automotive industries and widely investigated since the 1950s. Most investigations so far consider cavities where opening length and width are of similar scale. The present investigation focuses on a less investigated setup, namely cavities that resemble the door gaps of automobiles. These...
journal article 2010
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De Jong, P.M.A. (author), In 't Veld, A.C. (author), De Leege, A.M.P. (author), Van Paassen, M.M. (author), Mulder, M. (author)
Amsterdam Schiphol Airport currently uses a Continuous Descent Approach during night time operations only, due to reduced runway capacity caused by unpredictable individual aircraft behavior. The Three-Degree Decelerating Approach (TDDA) has been developed to increase predictability and runway capacity by switching the sepa- ration task from Air...
conference paper 2010
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Van den Hoven, M.C.L. (author), De Jong, P.M.A. (author), Borst, C. (author), Mulder, M. (author), Van Paassen, M.M. (author)
This paper covers an analysis of the energy management task during the approach phase as well as the design of an experiment supporting this analysis. The energy management task is analyzed using the concept of energy rate demand, which expresses the amount of total energy to be lost in comparison to the minimal energy rate the aircraft can...
conference paper 2010
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De Jong, A.T. (author), Bijl, H. (author)
Cavity aeroacoustic noise is relevant for aerospace and automotive industries and widely investigated since the 1950’s. Most investigations so far consider cavities where opening length and width are of similar scale. The present investigation focuses on a less investigated setup, namely cavities that resemble the door gaps of automobiles. These...
conference paper 2010
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De Jong, A. (author)
Unavailability of technical systems, such as aircraft, is expensive. Technical systems require maintenance to prevent and to remedy defects that cause unavailability. Users of technical systems usually bear the consequences of the risk of unavailability, in particular the loss of productivity. This is based on the presumption that users are best...
doctoral thesis 2010
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De Jong, S. (author), Maddox, E. (author), Vollmuller, G.J. (author), Schuurbiers, C.A.H. (author), Van Swaaij, R.A.C.M.M. (author), Ubbels, W.J. (author), Hamann, R.J. (author)
The Delfi-C3 nanosatellite successor, Delfi-n3Xt, is currently under development at Delft University of Technology and scheduled for launch in the first half of 2010. This improved three-unit CubeSat platform allows novel technology qualification for future small satellites and innovative scientific research. The platform is improved by...
conference paper 2008
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De Jong, S. (author), Aalbers, G.T. (author), Bouwmeester, J. (author)
The Delfi-C3 nanosatellite successor, Delfi-n3Xt, is currently under development at Delft University of Technology. This nanosatellite based on a three-unit CubeSat form factor has been improved through the implementation of a high-speed downlink, three-axis active attitude control and a single-point-failure free implementation of batteries in...
conference paper 2008
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De Jong, T.W. (author)
Fibre-Metal-Laminates have excellent properties for aerospace applications, with GLARE as an example. The metal layers inside the laminate provide permanent plastic deformations for the whole laminate; in principle Fibre-Metal-Laminates can be formed with common sheet metal forming processes. The difference between monolithic sheet metal and...
doctoral thesis 2004
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Bakker, M.C.M. (author), De Jong, F.B.P. (author)
Due to an unexpected increase of heavy traffic large fatigue cracks appeared through the deck plate of orthotropic steel bridge decks in the Netherlands. Visual inspection revealed that this particular type of crack initiates where a weld joins the deck plate, a rib and a girder. These critical points are commonly inspected from the roadside,...
journal article 2003
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De Jong, Th. (author)
doctoral thesis 1987
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De Jong, H.F. (author)
report 1980
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De Jong, H.F. (author)
report 1980
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