Searched for: contributor%3A%22Schrijer%2C+F.F.J.+%28mentor%29%22
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Schilder, Jop (author)
Contrary to conventional wisdom favouring smooth surfaces for drag reduction, the last decades have brought forth different textured surfaces showing drag reduction in turbulent boundary layers, of which riblets are the most studied.<br/>Sirovich and Karlson (1997) introduced a different textured surface named chevron-shaped protrusions,...
master thesis 2024
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González Romero, Andrea (author)
As the space industry continues to grow rapidly, the development of reusable launch vehicles has become crucial in achieving cost-effective and sustainable access to space. Payload capacity optimisation has been at the forefront of this effort, leading to a renewed interest in hammerhead or bulbous payload fairing (PLF) configurations. These...
master thesis 2023
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Sofia-Gabrion, Grégoire (author)
A series of numerical simulations was executed using the high-performance cluster at TU Delft's Aerospace Faculty. The primary objective was to gain deeper insights into the intricate dynamics of a sonic transverse jet in a supersonic crossflow with an oblique induced shock wave, especially concerning mixing. These simulations delved into the...
master thesis 2023
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Bron Jacobs, Joachim (author)
A Tomographic Background-Oriented Schlieren (TBOS) technique is developed to aid in the visualization of compressible flows. An experimental setup was devised around a sub-scale rocket nozzle, in which four cameras were set up in a circular configuration with 30° angular spacing in azimuth. Measurements were taken of the overexpanded supersonic...
student report 2023
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Formidabile, Martina (author)
TOP contoured nozzles, with large area-ratios, are commonly employed in rocket propulsion systems as they feature an excellent thrust-to-weight ratio. A significant shortcoming to this design is that, during the startup and shutdown transients of a LRE, the internal nozzle flow progresses through a series of overexpanded flow states - Free Shock...
master thesis 2023
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Knoop, Max (author)
Turbulent drag reduction (DR) is a crucial research area, as this can contribute to significant energy and emission reductions in various industrial and transportation applications. One such technique is the active flow control method of spanwise forcing. Spanwise forcing introduces a spatio-temporal spanwise wall oscillation as a boundary...
master thesis 2023
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Rabilotta Yañez, Zyanya (author)
The transonic regime is of great interest for designing aircraft wings because most conventional aircraft fly transonic. When flying in this regime, the wing of the aircraft tends to experience a phenomenon known as buffet, which is characterized by an oscillating shock wave. The surface pressure of a structure experiencing transonic flow is...
master thesis 2023
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Jose, Nikhil (author)
Surfaces that induce slip at the wall have been shown to reduce skin friction drag in the turbulent regime. While superhydrophobic and liquid-infused surfaces are capable of drag reduction in turbulent hydrodynamic flows, neither would be feasible in aerodynamic applications due to the added roughness and the minuscule slip lengths created by...
master thesis 2023
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Baeta Campos da Rocha Fontes, Tomás (author)
This Master thesis consists in investigating the formation and behavior of vapor and ice plumes. These plumes can occur in icy moons of our solar system, such as Europa or Enceladus, which are widely believed to have a liquid water ocean beneath their crust. These plumes most likely consist of a sub- surface reservoir of liquid water fed by the...
master thesis 2023
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JAWAHAR, SAHANA (author)
Flat surfaces with arrays of wall-normal pores called micro-cavity arrays have shown potential to reduce turbulent skin friction drag. Their designs have been inspired by acoustic liners which are sandwich panels consisting of a honeycomb core, a perforated top plate and a solid back sheet used on...
master thesis 2022
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Sadowy-Sadowski, Tomasz (author)
The concept of a spaceplane, a launch system that is a combination of an airplane and a rocket, is one of the most promising concepts of sustainable access to space. Along its trajectory, it experiences most extreme conditions with frequently opposing design requirements, making it one of the most complicated challenges in aerospace engineering....
master thesis 2022
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Pearse, Oliver (author)
During the start-up and shutdown sequence of rocket engines, immense forces are generated that are required to propel the payload into earth's orbit or outer space. The bulk of the generated forces are in the form of thrust. However, forces are also generated that act perpendicularly to the thrust direction. These side-loads are unwanted...
master thesis 2022
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Bauer, Yorrick (author)
A loss of vacuum accident in the hyperloop tunnel will likely occur during its operation, and it may have a severe impact on its operational safety. Nevertheless, the hyperloop tube breach has only been researched superficially.<br/><br/>Two aerodynamic phenomena due to the breach are identified: a (quasi-)steady underexpanded jet and an...
master thesis 2022
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Carrasco Grau, Julio (author)
In the last decades, the prevailing belief that smooth surfaces offer the lowest drag has been challenged often. Scholars have, for example, introduced rough and modified surfaces to reduce turbulent skin friction. One of the technologies proposed in the literature is an array of chevron-shaped protrusions; however, there is no academic...
master thesis 2022
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Aditya, Abhyuday (author)
Supersonic flows cause thin panels to flutter, which is characterized by high-amplitude self-sustained oscillations, increasing the risk of fatigue failure. Flutter is known to be exacerbated when a shock wave impinges on the panel, creating a shock wave/boundary-layer interaction (SWBLI) which promotes separation of flow and leads to increased...
master thesis 2022
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Mathijssen, Lucas (author)
Supersonic panel flutter is a self-excited vibration, where energy is transferred into thin flexible panels, such as skin panels in supersonic vehicles, from the (supersonic) flow around them, which can lead to their rapid fatigue failure. Relevant examples of this include the failure of skin panels in the X-15 vehicle, or violent oscillations...
master thesis 2022
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van der Hijden, Nick (author)
Supersonic plumes consistent of water vapor and ice particles have been observed by the Cassini spacecraft when flying over the tiger stripes of Enceladus at the south polar terrain of the satellite. Measurements of the salinity of the plumes (0.5-2%) and the size of the emitted particles, indicate a subsurface liquid ocean beneath the crust of...
master thesis 2021
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de Kievit, Krijn (author)
Rocket booster engines generally must operate at a large variety of atmospheric conditions. To achieve optimal total impulse during engine operation, these engines are normally optimized to be optimally expanded at high altitude, and low ambient pressure. The expansion ratio is constrained by the sea-level operational conditions, for a too high...
master thesis 2021
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Hartog, Friso (author)
Turbulent drag is the largest source of fuel consumption in aviation and forms a significant contribution to climate warming. Recent numerical studies have suggested the ability of surfaces with streamwise-preferential permeability to reduce turbulent friction, and a theoretical framework behind the working mechanism has been proposed. This work...
master thesis 2021
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Solergibert I Travé, Oriol (author)
Inspired by the dolphin skin, compliant coatings have been researched as a passive flow control solution to reduce drag. Both successful and drag-increasing experiments can be found in the literature. However, the mechanism is not well understood neither the combination of surface properties and flow conditions that yield a drag reduction. At...
master thesis 2021
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