Zobrazeno 1 - 10
of 600
pro vyhledávání: '"Hasse, Christian"'
In combustion theory, flames are usually described in terms of the dynamics of iso-surfaces of a specific scalar. The flame displacement speed is then introduced as a local variable quantifying the progression of these iso-surfaces relative to the fl
Externí odkaz:
http://arxiv.org/abs/2411.05756
So far, flamelet theory has treated curvature as an independent parameter requiring specific means for closure. In this work, it is shown how the adoption of a two-dimensional orthogonal composition space allows obtaining formal mathematical relation
Externí odkaz:
http://arxiv.org/abs/2405.19617
Autor:
Gossel, Lisanne, Corbean, Elisa, Dübal, Sören, Brand, Paul, Fricke, Mathis, Nicolai, Hendrik, Hasse, Christian, Hartl, Sandra, Ulbrich, Stefan, Bothe, Dieter
Metal energy carriers recently gained growing interest in research as a promising storage and transport material for renewable electricity. Within the development of a metal-fueled circular energy economy, research involves a model hierarchy spanning
Externí odkaz:
http://arxiv.org/abs/2404.13092
Autor:
Luu, Tien Duc, Shamooni, Ali, Kronenburg, Andreas, Braig, Daniel, Mich, Johannes, Nguyen, Bich-Diep, Scholtissek, Arne, Hasse, Christian, Thäter, Gabriel, Carbone, Maurizio, Frohnapfel, Bettina, Stein, Oliver Thomas
Three-dimensional CP-DNS of reacting iron particle dust clouds in a turbulent mixing layer are conducted. The simulation approach considers the Eulerian transport equations for the reacting gas phase and resolves all scales of turbulence, whereas the
Externí odkaz:
http://arxiv.org/abs/2401.16944
Autor:
Böttler, Hannes, Kaddar, Driss, Ferraro, Federica, Scholtissek, Arne, Nicolai, Hendrik, Hasse, Christian
Flamelet-based methods are extensively used in modeling turbulent hydrocarbon flames. However, these models have yet to be established for (lean) premixed hydrogen flames. While flamelet models exist for laminar thermo-diffusively unstable hydrogen f
Externí odkaz:
http://arxiv.org/abs/2401.01444
Combustion of hydrogen can help in reducing carbon-based emissions but it also poses unique challenges related to the high flame speed and Lewis number effects of the hydrogen flame. When operated with conventional burners, a hydrogen flame can flash
Externí odkaz:
http://arxiv.org/abs/2310.09815
Publikováno v:
Combustion and Flame (2023)
A turbulent side-wall quenching (SWQ) flame in a fully developed channel flow is studied using Large-Eddy Simulation (LES) with a tabulated chemistry approach. Three different flamelet manifolds with increasing levels of complexity are applied: the F
Externí odkaz:
http://arxiv.org/abs/2308.07833
Autor:
Bissantz, Julian, Karpowski, Jeremy, Steinhausen, Matthias, Luo, Yujuan, Ferraro, Federica, Scholtissek, Arne, Hasse, Christian, Vervisch, Luc
Publikováno v:
Applications in Energy and Combustion Science, Volume 13, 2023
Artifical neural networks (ANNs) are universal approximators capable of learning any correlation between arbitrary input data with corresponding outputs, which can also be exploited to represent a low-dimensional chemistry manifold in the field of co
Externí odkaz:
http://arxiv.org/abs/2308.05775
Autor:
Karpowski, T. Jeremy P., Ferraro, Federica, Steinhausen, Matthias, Popp, Sebastian, Arndt, Christoph M., Kraus, Christian, Bockhorn, Henning, Meier, Wolfgang, Hasse, Christian
In this work, the thermo-acoustic instabilities of a gas turbine model combustor, the so-called SFB606 combustor, are numerically investigated using Large Eddy Simulation (LES) combined with tabulated chemistry and Artificial Thickened Flame (ATF) ap
Externí odkaz:
http://arxiv.org/abs/2308.05431
Metals can serve as carbon-free energy carriers, e. g. in innovative metal-metal oxide cycles as proposed by Bergthorson (Prog. Energy Combust. Sci., 2018). Iron powder is a suitable candidate since it can be oxidized with air. Nevertheless, the comb
Externí odkaz:
http://arxiv.org/abs/2304.14927