The dynamics and structure of two turbulent H2/air premixed flames, representative of the corrugated flamelet (Case 1) and thin reaction zone (Case 2) regimes, are analyzed and compared, using the computational singular perturbation (CSP) tools, by incorporating the tangential stretch rate (TSR) approach. First, the analysis is applied to a laminar premixed H2/air flame for reference. Then, a two-dimensional (2D) slice of Case 1 is studied at three time steps, followed by the comparison between two representative 2D slices of Case 1 and Case 2, respectively. Last, statistical analysis is performed on the full three-dimensional domain for the two cases. The dominant reaction and transport processes are identified for each case and the overall role of kinetics/transport is determined.

Analysis of hydrogen/air turbulent premixed flames at different Karlovitz numbers using computational singular perturbation / Manias, Dimitris M.; Tingas, Efstathios-Al.; Hernández Pérez, Francisco E.; Im, Hong G.; Galassi, Riccardo Malpica; Ciottoli, Pietro Paolo; Valorani, Mauro. - ELETTRONICO. - 210059(2018), pp. 3304-3323. ((Intervento presentato al convegno AIAA Aerospace Sciences Meeting, 2018 tenutosi a Kissimmee; United States [10.2514/6.2018-0364].

Analysis of hydrogen/air turbulent premixed flames at different Karlovitz numbers using computational singular perturbation

Galassi, Riccardo Malpica;Ciottoli, Pietro Paolo;Valorani, Mauro
2018

Abstract

The dynamics and structure of two turbulent H2/air premixed flames, representative of the corrugated flamelet (Case 1) and thin reaction zone (Case 2) regimes, are analyzed and compared, using the computational singular perturbation (CSP) tools, by incorporating the tangential stretch rate (TSR) approach. First, the analysis is applied to a laminar premixed H2/air flame for reference. Then, a two-dimensional (2D) slice of Case 1 is studied at three time steps, followed by the comparison between two representative 2D slices of Case 1 and Case 2, respectively. Last, statistical analysis is performed on the full three-dimensional domain for the two cases. The dominant reaction and transport processes are identified for each case and the overall role of kinetics/transport is determined.
AIAA Aerospace Sciences Meeting, 2018
combustion; premixed flames; tangential stretching rate
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Analysis of hydrogen/air turbulent premixed flames at different Karlovitz numbers using computational singular perturbation / Manias, Dimitris M.; Tingas, Efstathios-Al.; Hernández Pérez, Francisco E.; Im, Hong G.; Galassi, Riccardo Malpica; Ciottoli, Pietro Paolo; Valorani, Mauro. - ELETTRONICO. - 210059(2018), pp. 3304-3323. ((Intervento presentato al convegno AIAA Aerospace Sciences Meeting, 2018 tenutosi a Kissimmee; United States [10.2514/6.2018-0364].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1151690
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