Impact of thermal diffusion on lean near-limit H2-CH4-air flames

Francisco Hernandez Perez, Hong Im, Zhen Zhou, Yuriy Shoshin, Jeroen van Oijen, Philip de Goey

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

In this research work, we investigate the influence of transport models and thermal diffusion (Soret effect) on numerical predictions of zero-gravity flame balls as well as normal-gravity steady and closed burner-stabilized reacting fronts for lean hydrogen-methane-air premixed mixtures, having a 40% hydrogen (H2) and 60% methane (CH4) fuel composition, specified on a molar basis. Three transport models are considered in the simulations: mixture-averaged, multicomponent, and multicomponent with inclusion of thermal diffusion. Although differences are found between the mixture-averaged and multicomponent solutions, they are not as prominent as those found when thermal diffusion is accounted for. The inclusion of thermal diffusion leads to predictions of larger flame sizes for both the zero-gravity flame balls and the normal-gravity burner-stabilized flames. Furthermore, lower lean limits are predicted when thermal diffusion is included in the computations.
Originele taal-2Engels
TitelAIAA Scitech 2019 Forum
UitgeverijAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN van geprinte versie9781624105784
DOI's
StatusGepubliceerd - 2019
EvenementAIAA Scitech 2019 Forum - San Diego, Verenigde Staten van Amerika
Duur: 7 jan 201911 jan 2019

Congres

CongresAIAA Scitech 2019 Forum
LandVerenigde Staten van Amerika
StadSan Diego
Periode7/01/1911/01/19

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  • Citeer dit

    Hernandez Perez, F., Im, H., Zhou, Z., Shoshin, Y., van Oijen, J., & de Goey, P. (2019). Impact of thermal diffusion on lean near-limit H2-CH4-air flames. In AIAA Scitech 2019 Forum American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2019-2366