Searched for: subject%3A%22venturi%22
(1 - 15 of 15)
document
Lecardonnel, A. (author), de Servi, C.M. (author), Colonna, Piero (author), Laboureur, D. (author)
In evaporators, the distribution of the liquid and vapor phases among the channels is a convoluted problem, depending on a wide range of parameters. However, maldistribution causes important losses of performance. Due to their complexity, the accurate modeling of such two-phase flows is difficult to handle. Hence, experimental studies are...
journal article 2024
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van Ruiten, Martijn (author)
Hydrokinetic energy is an environmentally friendly source of electricity and it has the advantage to be more predictable compared to other renewables. According to IRENA (2020), the capacity of converting hydrokinetic energy into electricity is expected to increase in the coming decades as many concepts are in the pipeline. One of these...
master thesis 2021
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Jahangir, S. (author)
Cavitation is a well-known phenomenon, occurring in a wide range of applications. In most applications, cavitation is undesirable, such as turbines, pumps, ship propellers and diesel injector nozzles. Cavitation can cause material erosion, flow blockage, noise and degradation of equipment over time. The ability to predict the behavior of this...
doctoral thesis 2020
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van den Boogaard, Maurits (author)
Tip vortex cavitation was previously identified as a source of the broadband noise emitted by ships underwater. This leads to unwanted noise and vibrations on board, which reduces passenger comfort, and increases the underwater signature of naval ships. The influence of different cavitation regimes on propellers and boundary layer transition on...
master thesis 2019
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van Erp, Stefan (author)
The goal of this research is to assess technical and economic feasibility of hydropower at the weir-complex of Driel. A local initiative opting to improve the environment gained interest in the idea and asked Arcadis NL for help. The weir complex at Driel lays in a key position in the Dutch river Delta and regulates the flow to the IJssel and...
master thesis 2019
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Jahangir, S. (author), Wagner, E.C. (author), Mudde, R.F. (author), Poelma, C. (author)
Cavitation is a complicated multiphase phenomenon, where the production of vapor cavities leads to an opaque flow. Exploring the internal structures of the cavitating flows is one of the most significant challenges in this field of study. While it is not possible to visualize the interior of the cavity with visible light, we use X-ray...
journal article 2019
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Jahangir, S. (author), Hogendoorn, W.J. (author), Poelma, C. (author)
Partial cavitation dynamics in an axisymmetric converging-diverging nozzle are investigated experimentally. Shadowgraphy is used to visualize and analyze different cavitation regimes. These regimes are generated by changing the global static pressure and flow velocity independently. Cloud cavitation is the most interesting and complex regime,...
journal article 2018
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Dash, A. (author), Jahangir, S. (author), Poelma, C. (author)
A quantitative analysis of two imaging modalities, shadowgraphy and x-ray imaging, is presented in the framework of void fraction determination. The need for this arises from the fact that shadowgraphs are sometimes utilized to quantify void fraction profiles, which is an unproven method. Time-averaged x-ray images are used to evaluate the...
journal article 2018
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Jahangir, S. (author), Wagner, E.C. (author), Mudde, R.F. (author), Poelma, C. (author)
Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an...
conference paper 2018
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Komez-Daglioglu, E. (author)
Context is a crucial concept in architecture, despite the frequent ambiguity around its use. It is present in many architectural thoughts and discussions, while a critical discursive reflection is absent from contemporary architectural theory and practice. Situated within this schizophrenic condition in which the notion is both absent and...
doctoral thesis 2017
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Kemperman, R.A.M. (author)
At the Faculty of Architecture, Urbanism & Building sciences of the Technical University in Delft, research is being executed on the specific characteristics and performance of the driving ventilation components: solar chimneys and wind-induced exhausts. Along with this development the performance of a natural ventilated office building model...
master thesis 2012
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Van Hooff, T. (author), Blocken, B. (author), Aanen, L. (author), Bronsema, B. (author)
Wind tunnel experiments and Computational Fluid Dynamics (CFD) are used to analyse the flow conditions in a venturi-shaped roof, with focus on the underpressure in the narrowest roof section (contraction). This underpressure can be used to partly or completely drive the natural ventilation of the building zones. The wind tunnel experiments are...
journal article 2011
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Trommelen, M.H.T. (author)
When performing minimally invasive interventions, surgeons use grippers to grip and manipulate tissue. These grippers generally rely on their toothed profile and require pinching of the tissue for sufficient grip, entailing a risk of tissue damage. An solution should be found for this risk of damage. An alternative could be to manipulate the...
master thesis 2011
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Boiten, W. (author)
report 1985
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Kranenburg, A.A. (author)
Dit laboratoriumonderzoek is één van de opdrachten in het laatste jaar van het ingenieursexamen aan de afdeling Weg- en Waterbouwkunde. Het omvat enerzijds een onderzoek naar de invloed van cylinders op een waterstroom in een goot. Anderzijds is een onderzoek gedaan naar de invloed van cylinders op de stuwhoogtemeting, cq. afvoer voor een...
report 1974
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