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https://doi.org/10.21256/zhaw-22515
Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
Art der Begutachtung: | Peer review (Publikation) |
Titel: | Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions : ignition, stability and turbulent reaction-front velocity |
Autor/-in: | Gruber, Andrea Bothien, Mirko Ciani, Andrea Aditya, Konduri Chen, Jacqueline H. Williams, Forman A. |
et. al: | No |
DOI: | 10.1016/j.combustflame.2021.02.031 10.21256/zhaw-22515 |
Erschienen in: | Combustion and Flame |
Band(Heft): | 229 |
Heft: | 111385 |
Erscheinungsdatum: | 2021 |
Verlag / Hrsg. Institution: | Elsevier |
ISSN: | 0010-2180 |
Sprache: | Englisch |
Schlagwörter: | Hydrogen; Spontaneous ignition; Reheat combustion; Flame pulsation; Turbulent flame velocity; Direct Numerical Simulation |
Fachgebiet (DDC): | 621.04: Energietechnik |
Zusammenfassung: | Direct Numerical Simulations (DNS) are performed to investigate the process of spontaneous ignition of hydrogen flames at laminar, turbulent, adiabatic and non-adiabatic conditions. Mixtures of hydrogen and vitiated air at temperatures representing gas-turbine reheat combustion are considered. Adiabatic spontaneous ignition processes are investigated first, providing a quantitative characterization of stable and unstable flames. Results indicate that, in hydrogen reheat combustion, compressibility effects play a key role in flame stability and that unstable ignition and combustion are consistently encountered for reactant temperatures close to the mixture’s characteristic crossover temperature. Furthermore, it is also found that the characterization of the adiabatic processes is also valid in the presence of non-adiabaticity due to wall heat-loss. Finally, a quantitative characterization of the instantaneous fuel consumption rate within the reaction front is obtained and of its ability, at auto-ignitive conditions, to advance against the approaching turbulent flow of the reactants, for a range of different turbulence intensities, temperatures and pressure levels. |
URI: | https://digitalcollection.zhaw.ch/handle/11475/22515 |
Volltext Version: | Publizierte Version |
Lizenz (gemäss Verlagsvertrag): | CC BY 4.0: Namensnennung 4.0 International |
Departement: | School of Engineering |
Organisationseinheit: | Institut für Energiesysteme und Fluid-Engineering (IEFE) |
Enthalten in den Sammlungen: | Publikationen School of Engineering |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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2021_Gruber-etal_Direct-Numerical-Simulation-of-hydrogen-combustion.pdf | 5.11 MB | Adobe PDF | Öffnen/Anzeigen |
Zur Langanzeige
Gruber, A., Bothien, M., Ciani, A., Aditya, K., Chen, J. H., & Williams, F. A. (2021). Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions : ignition, stability and turbulent reaction-front velocity. Combustion and Flame, 229(111385). https://doi.org/10.1016/j.combustflame.2021.02.031
Gruber, A. et al. (2021) ‘Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions : ignition, stability and turbulent reaction-front velocity’, Combustion and Flame, 229(111385). Available at: https://doi.org/10.1016/j.combustflame.2021.02.031.
A. Gruber, M. Bothien, A. Ciani, K. Aditya, J. H. Chen, and F. A. Williams, “Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions : ignition, stability and turbulent reaction-front velocity,” Combustion and Flame, vol. 229, no. 111385, 2021, doi: 10.1016/j.combustflame.2021.02.031.
GRUBER, Andrea, Mirko BOTHIEN, Andrea CIANI, Konduri ADITYA, Jacqueline H. CHEN und Forman A. WILLIAMS, 2021. Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions : ignition, stability and turbulent reaction-front velocity. Combustion and Flame. 2021. Bd. 229, Nr. 111385. DOI 10.1016/j.combustflame.2021.02.031
Gruber, Andrea, Mirko Bothien, Andrea Ciani, Konduri Aditya, Jacqueline H. Chen, and Forman A. Williams. 2021. “Direct Numerical Simulation of Hydrogen Combustion at Auto-Ignitive Conditions : Ignition, Stability and Turbulent Reaction-Front Velocity.” Combustion and Flame 229 (111385). https://doi.org/10.1016/j.combustflame.2021.02.031.
Gruber, Andrea, et al. “Direct Numerical Simulation of Hydrogen Combustion at Auto-Ignitive Conditions : Ignition, Stability and Turbulent Reaction-Front Velocity.” Combustion and Flame, vol. 229, no. 111385, 2021, https://doi.org/10.1016/j.combustflame.2021.02.031.
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