Coarse grid correction for partitioned fluid-structure interaction problems

The use of more flexible structures in aircraft offers considerable potential for more efficient aircraft, but increased exibility makes aircraft structures more susceptible to destructive interactions with the air ow around them. Numerical simulations are necessary to predict the behavior of these interactions so that aircraft designers can...

Impact of the space and satellite environment on the optical path differences of Darwin

ESA's space interferometry mission Darwin will make use of optical delay lines (ODL) to help control the optical path differences (OPD) between the satellites to the nanometer level. In order to determine the required ODL control bandwidth, this study investigates the order of magnitude of the high-frequency (> 1 Hz) disturbance forces, and...

Optimization of laser beam welding of PM1000 oxide dispersion strengthened super alloy for high temperature applications

The research of this thesis is focused on the optimization of laser beam welding of PMlOOO with respect to its high temperature mechanica! properties. This nickel chromium alloy is used for the thermal protection system of the re-entry test vehicle of ESA; Expert. With respect to the ceramic tiles which are used in conventional thermal...

Europan tidal deformation: Providing a theoretical framework for altimetry data to determine ocean presence

An H1(Ph)-Coercive Discontinuous Galerkin Formulation for The Poisson Problem: 1-D Analysis

Discontinuous Galerkin (DG) methods are finite element techniques for the solution of partial differential equations. They allow shape functions which are discontinuous across inter-element edges. In principle, DG methods are ideally suited for hp-adaptivity, as they handle nonconforming meshes and varying-in-space polynomial-degree...

Post-Seismic deformation in the Vrancea Region (Romania)

Improving the TOPEX/Poseidon calibration procedure by modeling and implementation of global isostatic adjustment

The main purpose of this research was to investigate the role of Global Isostatic Adjustment in the calibration of the TOPEX/Poseidon radar altimeter which makes use of tide gauge data.

Improvements in Hybrid PIV/PTV algorithms and droplet sizing

Research is currently going on with the intention to improve spatial resolution of optical whole field velocity measurement techniques. Complementary to cross-correlation methods, combination of PIV and PTV is considered in so called Super resolution algorithms or Hybrid PIV/PTV techniques. In multi-phase flows, not only the velocity but also...

Geoid anomalies due to low-viscosity zones in glacial isostatic adjustment modeling

Maintenance planning optimization for the Boeing 737 next generation aircraft

This research is aimed at developing a cost-effective maintenance planning and packaging method that will lead to the reduction in direct maintenance costs, yet maintaining the reliability of the Boeing 737 NG aircraft.

A comparative study of long-term polar motion of terrestrial bodies

Aerodynamic drag and geomagnetic perturbations: their modelling and effect on spacecraft dynamics

This study is aimed·at the improvement of the modelling of aerodynamic drag, acting on spacecraft. In particular, the fit of the theoretically generated orbit of the GEOS-3 satellite through laser range measurements, obtained by tracking stations all over the world, in various periods of time, is improved. Special attention is paid to the effect...

Aerodynamic characteristics of a curved plate airfoil section at Reynolds Numbers 60.000 and 100.000 and angles of attack from -10 to +90 degrees

The employment potential of a Dutch offshore wind energy market

Wind energy is currently one of the fastest growing markets in the world. In the Netherlands the potential for onshore wind energy is not large because of siting problems. Therefore the focus in the Netherlands has shifted from onshore to offshore wind energy because the wind climate offshore is substantially better than onshore. For the Dutch...

Design of an urban wind turbine with diffuser

New wind turbines for placement in the urban environment appeared in the recent years. These urban wind turbines are still expensive; they produce electricity against higher costs then the current consumer’s price for electricity in the Netherlands. Another drawback for most of the new wind turbines is that they are too small for placement upon...

Update Offshore Wind Atlas: Implementing a variable sea surface roughness

In 2005 the Energy research Centre of the Netherlands (ECN) published its first version of the Offshore Wind Atlas of the Dutch part of the North Sea [3]. This version has been updated and improved using longer time series and another approach for the calculation of the roughness of the sea surface. In contradiction to other Wind Atlases which...