Searched for: contributor%3A%22Kotsonis%2C+Marios+%28mentor%29%22
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Westerbeek, Sven (author)
The laminar-turbulent transition of boundary layers is accompanied by an increase in friction drag. Laminar airfoils are a promising technology to reduce the emission of greenhouse gasses caused by the aerospace industry. The transition scenario in airliners is dominated by stationary crossflow vortices whose evolution is strongly nonlinear....
master thesis 2020
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Hak, Marlies (author)
This report comprises the research entitled 'Numerical and experimental investigation on the resistance of a human upper airway'. The objective of this research is: To investigate the effects of a swirl producing inlet on the pressure drop in a simplified human upper airway model at high ow rates, by means of numerical simulations and...
master thesis 2015
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Schoemakers, Wijnand (author)
This thesis aims to explore and enable parameter estimation using the data assimilation method of the ensemble Kalman filter (EnKF). More specillically applied to the quasi-steady flow field, measured using particle image velocimetry (PIV), of a plasma actuator in quiescent ow where the parameters to be estimated are those describing the force...
master thesis 2014
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Pul, Robin (author)
Active load control for load alleviation has become more important in the wind energy industry in recent years. The continuously increasing size of wind turbines has eventually led to the point where efficient mitigation of the fatigue loads on the blades, due to unsteady wind or gusts, is becoming an important aspect in the design. Suppression...
master thesis 2013
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van Berkel, Erik (author)
Because of the low fuel consumption, turboprop aircraft have made a strong revival during recent years and have come to dominate the current regional flight market. Increased interest in propeller research is a result of this trend. This thesis project focuses on the effect of non-uniform inflow on the propeller performance. Two sources of non...
master thesis 2013
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Shukla, Ram Krishan (author)
Understanding, predicting and controlling laminar to turbulent transition is of great interest due to the wide range of practical applications where transition is significant. Generally, turbulent flow has an order of magnitude higher skin friction. Fuel savings of up to 25% would be possible for a large commercial aircraft if laminar flow could...
master thesis 2013
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Gupta, Abhineet (author)
The aerodynamic noise generated by trailing edge of aircraft wings at take-o_ and approach con_guration continues to be a critical factor in the future development of aviation. Trailing edge noise is also a serious concern for wind turbines, marine propellers, helicopter rotors, axial and centrifugal turbines and compressors. A fundamental...
master thesis 2013
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Kounenis, Harry (author)
Nowadays, the evolution of multi-element airfoils presents a change of route, towards a "circular arch", in order to achieve the ultimate lift force [9]. Particularly, for wing-ap configurations, the enhancement of high lift performance, is of great interest and growing research at Delft University of Technology. Typically, the main approach...
master thesis 2012
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Ravichandran, Siddharth (author)
Vortex shedding occurs from commonly encountered objects in ows such as blunt and divergent (truncated) airfoil trailing edges [12], landing gear of aircraft [37], etc. In addition to undesired aero-elastic effects such as vortex-induced vibration and uctuating aerodynamic forces, tonal acoustic noise is emitted due to the regular and periodic...
master thesis 2012
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el Haddar, Jaouad (author)
Nowadays, the development of multi-element airfoils show a progression towards a “circular arc” to attain a maximum lift force. The improvement of the high lift performance of specifically a wing-flap combination is an ongoing research at Delft University of Technology. Generally, a higher lift force can be created by deflecting the flap to...
master thesis 2012
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Hennevelt, Marcel (author)
The coherent structures within the turbulent boundary layers have been investigated extensively over the past five decades. In particular, the long alternating low- and high speed streaks in the near-wall region. Along these streaks ejection and sweep events occur which play a major role in the production of Reynolds shear stress. Hence, studies...
master thesis 2012
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