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Hol, Joran (author)This thesis focused on designing and constructing a deoxygenation reactor through a modular experimental setup for Catalytic Hydrogen Combustion (CHC). The developed system aims to enhance hydrogen purification techniques. The setup enables testing various catalysts and conditions to remove oxygen down to 5 ppm in a hydrogen stream.<br/><br/>The...master thesis 2024
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Gonzalez Martinez, Pablo (author)This thesis explores the use of physics-informed neural networks (PINNs) to reconstruct the flow fields in a pool fire flame, a canonical configuration in non-premixed combustion. Due to the difficulty in obtaining adequate experimental characterizations of such flows, reacting flows like pool fires stand in need of novel methods capable of...master thesis 2024
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van Dalen, Sander (author)To meet the goals of the Paris agreement,sustainable aviation fuels, such as hydrogen, need be adopted on a large scale within the coming decades. Hydrogen-assisted combustion of kerosene is investigated as an intermediate step in the transition towards sustainable aviation. This study addresses the gaps in the current...master thesis 2024
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Stremming, Luca (author)Aviation is an important contributor to anthropogenic climate change. As indirect greenhouse gases, nitrogen oxides (NOx = NO + NO2) add to the Effective Radiative Forcing (ERF) induced by aircraft emissions. This work addresses a better understanding of emission mitigation by investigating dependencies between engine parameters and emitted...master thesis 2024
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Gunce, Cem (author)Today's electricity supply falls short of current demands, leading to the utilization of gas turbines in both ground based and avionic infrastructures. Nevertheless, these often rely on carbon-based fuels, resulting in escalating CO2 emissions. However, adopting hydrogen as a fuel eliminates carbon emissions. Aside from zero carbon emissions,...master thesis 2024
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Idjaton, Babatoundé I.T. (author), Togola, Anne (author), Ghestem, Jean Philippe (author), Kastler, Laura (author), Bristeau, Sébastien (author), Ronteltap, Mariska (author), Colombano, Stéfan (author), Devau, Nicolas (author), Lions, Julie (author), van Hullebusch, Eric D. (author)Emerging contaminants are a growing concern for scientists and public authorities. The group of per-polyfluoroalkyl substances (PFAS), known as ‘forever chemicals', in complex environmental liquid and solid matrices was analysed in this study. The development of global analytical methods based on combustion ion chromatography (CIC) is...journal article 2024
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Schenkel, Frank (author)To achieve the emission goals set out by the International Maritime Organization in 2018. Low or zerocarbon fuels will have to be used. Ammonia is considered to be a possible candidate since it doesn’t contain carbon. This thesis will attempt to study two methods that characterize the closed-cylinder process of an internal combustion engine; the...master thesis 2023
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Hosseini, A. (author)HIsarna is a new and breakthrough smelting reduction technology for producing liquid hot metal for steelmaking directly from iron ores. Compared to the conventional blast furnace route, HIsarna achieves a 20% reduction in CO2 emissions by eliminating coking and the need for iron ore agglomeration processes such as sintering and pelletizing and...doctoral thesis 2023
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Jha, Mayanka (author)With ongoing research towards clean combustion, hydrogen has been identified as a potential alternative to natural gas fuel, for example in power generation sectors utilizing gas turbines because of their inherent nature of being a carbon-free energy carrier. However, it is crucial to clarify that the ultimate goal is not just carbon-free...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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Klaessen, Alexander (author)There is a need to examine the potential of alternative methods such as Variational Multiscale Method (VMM) for the ability to improve the efficiency of combustion simulations. However the computational expense of a LES run of a 3D turbulent non-premixed combustion problem is high due to the large variety of length and time scales in turbulent...master thesis 2023
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Hoeksma, Bram (author)Currently, our society faces a pressing challenge: global warming. The solution lies in the energy transition, which replaces fossil fuels with clean sources. This requires a global effort across all sectors, including shipping. While a significant portion of shipping relies on polluting fuels, the European Union’s Green Deal aims for climate...master thesis 2023
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Jacobs, Isabelle (author)This graduation thesis studies the CI combustion of ammonia and hydrogen in an ICE. It contains a review of the literature and a modeling study of the ignition and cylinder performance of the AmmoniaDrive test engine. AmmoniaDrive is a NWO-funded research project that aims to decarbonize shipping by introducing an ammonia-fuelled SOFC-ICE power...master thesis 2023
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Molhuizen, Max (author)Battery electric vehicles (BEV) as opposed to internal combustion engine vehicles (ICEV) are seen as a viable solution for reducing transportation related environmental impacts. There are however advantages and disadvantages to both alternatives. Environmental life cycle assessments (LCA) are used to quantify the environmental lifecycle impact...master thesis 2023
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van den Berg, Thimo (author)Flameless combustion is a combustion regime which results in drastically lower 𝑁𝑂𝑥 emissions. 𝑁𝑂𝑥 has been found to influence global warming through its interactions with ozone chemistry and, exposure to this gas has been found to have adverse health effects on humans. The jet-in-hot-coflow design...master thesis 2023
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Van der Meer, Jochem (author)Combustion is and remains for the foreseeable future an essential chemical process. The physical and mathematical modelling of such processes can help to optimise the design and operation of combustion furnaces which is critical for fuel efficiency. Given the combined complexity and interaction of the gas flow dynamics and the reaction processes...bachelor thesis 2023
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Madhavan, Aravind Krishna (author)This investigation focuses on the premixed conical flame, a mainstay of combustion diagnostics. While extensive studies have explored high-frequency oscillations in the canonical Bunsen flame, little attention has been given to low-frequency oscillations affecting flame fronts. This thesis aims to explain the origins of these oscillations and...master thesis 2023
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Trotta, Luca (author)High-frequency combustion instabilities represent the main technical risk faced by design engineers when developing new chemical rocket propulsion systems. Such instabilities are driven by the coupling between the flames’ heat release rate and the combustion chamber’s acoustic field. As such, they can only be assessed during detailed design...master thesis 2023
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Hosseini, A. (author), Hage, Johannes (author), Meijer, Koen (author), Offerman, S.E. (author), Yang, Y. (author)In this paper a CFD analysis of HIsarna off-gas system for post combustion of CO-H2-carbon particle mixture is presented to evaluate the effect of different sub-models and parameters on the accuracy of predictions and simulation time. The effects of different mesh type, mesh grid size, radiation models, turbulent models, kinetic mechanism,...journal article 2023
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Bao, Hesheng (author), Han, Jinlin (author), Zhang, Yan (author), Di Matteo, Andrea (author), Roekaerts, D.J.E.M. (author), Van Oijen, Jeroen (author), Somers, Bart (author)In the current work, the Flamelet Generated Manifold (FGM) method is applied with large-eddy simulation (LES) to investigate the effect of methane on dual-fuel (DF) spray ignition. The diesel surrogate n-dodecane is injected as the so-called pilot fuel into selected lean methane–air mixtures, ranging from ϕ<sub>CH<sub>4</sub></sub>=0 to ϕ<sub...journal article 2023