Searched for: faculty:"Aerospace%5C+Engineering"
(1 - 20 of 3,177)

Pages

document
Abobeih, M.H.M.A. (author), Cramer, J. (author), Kalb, N. (author), Markham, M (author), Twitchen, Daniel J. (author), Taminiau, T.H. (author)
Single electron spins coupled to multiple nuclear spins provide promising multi-qubit registers for quantum sensing and quantum networks. The obtainable level of control is determined by how well the electron spin can be selectively coupled to, and decoupled from, the surrounding nuclear spins. Here we realize a coherence time exceeding a...
journal article 2018
document
Pallichadath, V. (author), De Athayde Costa E Silva, Marsil A. C. (author), Cordeiro Guerrieri, D. (author), Uludag, M.S. (author), Zandbergen, B.T.C. (author), Cervone, A. (author)
Delft University of Technology is currently developing the pico-satellite platform Delfi-PQ, based on the PocketQube standard, in pursuit of a new generation of satellites with lower cost, flexibility and short development time. A technology demonstration payload expected to fly in one of the first Delfi-PQ satellites is a dual thruster micro...
conference paper 2018
document
Borg Costanzi, C. (author), Ahmed, Z. Y. (author), Schipper, H.R. (author), Bos, F. (author), Knaack, U. (author)
One of the geometrical restrictions associated with printed paste materials such as concrete, is that material must be self-supporting during printing. In this research paper a new methodology for 3D Printing Concrete onto a temporary freeform surface is presented. This is achieved by setting up a workflow for combining a Flexible Mould...
journal article 2018
document
Sunil, E. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author)
This paper presents analytical models that describe the safety of unstructured and layered en route airspace designs. Here, ‘unstructured airspace’ refers to airspace designs that offer operators complete freedom in path planning, whereas ‘layered airspace’ refers to airspace concepts that utilize heading-altitude rules to vertically separate...
journal article 2018
document
De Athayde Costa E Silva, Marsil A. C. (author), Cordeiro Guerrieri, D. (author), Cervone, A. (author), Gill, E.K.A. (author)
This brief presents a comprehensive approach for the modeling of micropropulsion systems based on the vaporization of a liquid. The model combines the analytical and empirical relations derived from extensive experimental analysis and fundamental physical laws. This allows modeling of key parameters, such as mass flow rate, for the entire...
journal article 2018
document
Rubino, A. (author), Pini, M. (author), Vitale, S. (author), Colonna di Paliano, Piero (author)
Fast and accurate computation of thermo-physical properties is essential in computationally expensive simulations involving fluid flows that significantly depart from the ideal gas or ideal liquid behavior. A look-up table algorithm based on unstructured grids is proposed and applied to non-ideal compressible fluid dynamics simulations. The...
journal article 2018
document
Landman, H.M. (author), van Paassen, M.M. (author), Groen, Eric L. (author), Bronkhorst, Adelbert W. (author), Mulder, M. (author)
Objective: This study tested whether simulator-based training of pilot responses to unexpected or novel events can be improved by including unpredictability and variability in training scenarios. Background: Current regulations allow for highly predictable and invariable training, which may not be sufficient to prepare pilots for unexpected...
journal article 2018
document
Oehler, J.D. (author), Schmehl, R. (author)
Airborne wind energy is an evolving renewable energy technology with the potential to reduce material as well as energy investments and to harvest wind resources that have so far not been accessible. Ground generation systems use the pulling force of a kite to generate a linear traction motion driving a drum connected to a generator. To...
journal article 2018
document
Callens, S.J.P. (author), Bergsma, O.K. (author)
Two-matrix composites combine fibers with two distinct matrices. This is achieved by impregnating fiber bundles with a high-stiffness matrix and embedding the cured bundles in a flexible matrix. Two-matrix composites have been shown to offer unprecedented combinations of transverse flexibility and longitudinal tensile strength, and could offer...
journal article 2018
document
Dwight, R.P. (author), Kok, G. J. P. (author), Lucas, P. (author)
This paper presents an approach for updating the epistemic uncertainty of ultrasonic flow meter measurements under non-ideal flow conditions. Instead of re-calibrating the instrument to correct its behavior in these difficult working conditions, a Bayesian calibration of a computer model of the real process is used. The numerical model is...
journal article 2017
document
Sahai, A.K. (author), Simons, D.G. (author)
This paper presents a methodology with which aircraft designs can be modified such that they produce optimal sound signatures on the ground. With optimal sound it is implied in this case sounds that are perceived as less annoying by residents living near airport vicinities. A novel design and assessment chain has been developed which combines...
conference paper 2017
document
Li, Q. (author), Ragni, D. (author), Sinnige, T. (author), Eitelberg, G. (author), Veldhuis, L.L.M. (author), Yangang, Wang (author)
conference paper 2017
document
Lignarolo, L. (author), Ragni, D. (author), Simao Ferreira, C.J. (author), Van Bussel, G.J.W. (author)
The actuator disc (AD) model is commonly used to simplify the simulation of horizontal-axis wind-turbine aerodynamics. The limitations of this approach in reproducing the wake losses in wind farm simulations have been proven by a previous research. The present study is aimed at providing an experimental analysis of the near-wake turbulent flow...
journal article 2016
document
Kaja Kamaludeen, Shaafi M. (author), van Zuijlen, A.H. (author), Bijl, H. (author)
High computational cost associated with the high fidelity wake models such as RANS or LES serves as a primary bottleneck to perform a direct high fidelity wind farm layout optimization (WFLO) using accurate CFD based wake models. Therefore, a surrogate based multi-fidelity WFLO methodology (SWFLO) is proposed. The surrogate model is built...
journal article 2016
document
Lignarolo, L.E.M. (author)
The wake flow of a horizontal axis wind turbine is characterised by lower wind speed and higher turbulence than the free-stream conditions. When clustered in large wind farms, wind turbines regularly operate inside the wake of one or more upstream machines. This is a major cause of energy production loss and a source of higher fatigue loads on...
doctoral thesis 2016
document
Lara-Quintanilla, A. (author)
The design of aerodynamic airfoils are optimized for certain conditions. For instance, the shape of the wings of fixed-wing aircrafts are designed and optimized for a certain flight condition (in terms of altitude, speed, aircraft weight, etc.). However, these flight conditions vary significantly during the flight. Currently, aircraft are...
doctoral thesis 2016
document
Schneiders, J.F.G. (author), Pröbsting, S. (author), Dwight, R.P. (author), Van Oudheusden, B.W. (author), Scarano, F. (author)
A method is proposed to determine the instantaneous pressure field from a single tomographic PIV velocity snapshot and is applied to a flat-plate turbulent boundary layer. The main concept behind the single-snapshot pressure evaluation method is to approximate the flow acceleration using the vorticity transport equation. The vorticity field...
journal article 2016
document
Schneiders, J.F.G. (author), Pröbsting, S. (author), Dwight, R.P. (author), Van Oudheusden, B.W. (author), Scarano, F. (author)
A method is proposed to determine the instantaneous pressure field from a single tomographic PIV velocity snapshot and is applied to a flat-plate turbulent boundary layer. The main concept behind the single-snapshot pressure evaluation method is to approximate the flow acceleration using the vorticity transport equation. The vorticity field...
journal article 2016
document
Schneiders, J.F.G. (author), Pröbsting, S. (author), Dwight, R.P. (author), Van Oudheusden, B.W. (author), Scarano, F. (author)
A method is proposed to determine the instantaneous pressure field from a single tomographic PIV velocity snapshot and is applied to a flat-plate turbulent boundary layer. The main concept behind the single-snapshot pressure evaluation method is to approximate the flow acceleration using the vorticity transport equation. The vorticity field...
journal article 2016
document
Abouhamzeh, M. (author)
GLARE is used in fuselage panels for its improved fatigue and residual strength. In this thesis, predictive models are developed for residual stresses and distortions of GLARE induced by manufacturing. Material behaviour of the epoxy adhesive and the glass-epoxy prepreg is characterised for thermal and curing circumstances. The derived...
doctoral thesis 2016
Searched for: faculty:"Aerospace%5C+Engineering"
(1 - 20 of 3,177)

Pages