Searched for: contributor:"Scarano, Fulvio (mentor)"
(1 - 20 of 20)
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Ujjaini Kempaiah, Kushal (author)
Reduction of skin-friction drag over a fully developed canonical zero-pressure gradient turbulent boundary layer (ZPGTBL) subjected to spanwise oscillation is measured using planar particle image velocimetry (PIV). The experiments are conducted at Re<sub>θ</sub> of 1000 and 1800, the chosen range of spanwise oscillations amplitude and frequency...
master thesis 2019
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Saredi, Edoardo (author)
Car industry and motorsport development nowadays strongly rely on wind tunnel testing. As the literature survey shows, in order to fully understand the characteristics of the flow around a car, large-scale and volumetric flow field measurements are required. For its features, PIV can be pointed as a useful technique for automotive wind tunnels....
master thesis 2018
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Jux, Constantin (author)
Aerodynamics research and development often involves large-scale and turbulent flows; may this be a rotor flow, the wake of a car, or the flow passing a human athlete to name a few examples. Volumetric particle image velocimetry (PIV) is well suited for the study of such flows. The introduction of Helium Filled Soap Bubbles (HFSB) for wind...
master thesis 2017
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Gupta, Mudit (author)
Wings operated at low and moderate Reynolds number such as the ones of UAVs or the blades of small turbine and of compressors, can be the source of an aero-acoustic phenomenon called laminar boundary layer instability noise. The narrow band noise can be attenuated using trailing edge (TE) serrations (Chong et al. 2013, Moreau et al. 2012) but...
master thesis 2014
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Debrouwere, Maarten (author)
One of the main limitations of microphone measurements in an open-jet wind tunnel is spectral broadening. The phenomenon of spectral broadening is observed when a single frequency sound wave passes through a free shear layer. Inside the turbulent shear layer the wave interacts with the turbulence, which leads to broadening of the tone in the...
master thesis 2013
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de Ruijter, Demian (author)
The behaviour of an inviscid, constant density fluid on which no body forces act, may be modelled by the two-dimensional incompressible Euler equations, a non-linear system of partial differential equations. If a fluid whose behaviour is described by these equations, is confined to a space where no fluid flows in or out, the kinetic energy,...
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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van der Hoeven, Tim (author)
This study examines the effects of slot suction on the mean characteristics of a two-dimensional turbulent boundary layer. Previous studies on this subject have mainly focused on low Reynolds number boundary layers (i.e. Re_ B 2,000). Furthermore, numerical tools are often not able to accurately predict the effects of slot suction. To grasp the...
master thesis 2013
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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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Krishna, Swathi (author)
Impinging jets are relevant ow configurations in many technological developments. For example, on some short take-off and landing aircraft the high speed exhaust from the jet engine is deflected by direct impingement on the aps to create extra lift during take-off. Fatigue due to excessive dynamic loading on the aps and high levels of noise...
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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Ekelschot, Dirk (author)
Aerodynamic heating is one of the driving aspects in hypersonic vehicle design. During take-off and re-entry, high heat loads are encountered for which the appropriate measures have to be considered. In particular during the re-entry phase, high maneuverability of the vehicle is preferred such that reusable (manned) spacecraft can land on...
master thesis 2012
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Eisma, Jerke (author)
Flapping wing flight has attracted increased interest among aerodynamics researchers recently in view of the recent expansion of design efforts in the field of Micro Aerial Vehicles (MAVs). MAVs are given specific attention because of their potential as mobile platforms capable of reconnaissance and gathering intelligence in hazardous and...
master thesis 2012
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Correale, Giuseppe (author)
The results of a preliminary experimental research on a Nanosecond Dielectric Barrier Discharge Plasma Actuator are presented in this document. For carrying out such a research, experiments were performed in the low speed facilities of Delft University of Technology. Four wind tunnels and several data acquisition techniques have been used in...
master thesis 2011
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Sulaiman, Zana (author)
Aeroacoustic wind tunnel measurements are often carried out in open-jet wind tunnels using scaled models. Sound reected from the wall, which is a problem with closed section wind tunnels, is eliminated by the use of an anechoic test section. Typically, the model is placed inside the ow and the microphones locations are outside the ow. Hence, the...
master thesis 2011
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Vleugels, Roel (author)
The research explained in this report is conducted as part of a larger project which aims to have a better understanding of the fluid dynamics inside the pulmonary system. This part of the project aims more specifically on the effect of chronic obstructive pulmonary diseases (COPD) on the flow inside the pulmonary system. COPD causes loss of...
master thesis 2011
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Klein Heerenbrink, Marco (author)
Unsteady aerodynamics deals with air flows that can not be sufficiently described without considering the time dependence of the flow. Unsteady flow phenomena are encountered with wind turbines, helicopter rotors and aeroplane propellers. It is also an important factor in the study of animal flight, with birds, bats and insects flapping to...
master thesis 2011
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Nati, Giovanni (author)
Aerodynamic performance, structural properties and production processes have increasing relevance in wind turbine design. Trailing edge truncation is applied to increment structural strength, reduce weight and facilitate production. Besides the obvious structural benefits, trailing edge truncation can also lead to improved lift characteristics...
master thesis 2011
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Nati, Andrea (author)
In the last years the interest in small unmanned air vehicles (UAVs) has increased. Due to technological improvements, miniaturisation of UAVs is possible in different type of aerial vehicles, varying from airplanes to helicopters. Different from airplanes, helicopters have continuous airfoil motion, which introduces aerodynamic complications,...
master thesis 2010
Searched for: contributor:"Scarano, Fulvio (mentor)"
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