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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

DNS OF METHANE/HYDROGEN-AIR TURBULENT SWIRLING PREMIXED FLAME IN A CUBOID COMBUSTOR

Get access (open in a dialog) DOI: 10.1615/IHTC16.cat.024155
pages 1665-1671

Résumé

The structure of stoichiometric methane/hydrogen-air turbulent swirling premixed flames in a cuboid combustor are investigated in physical and phase spaces by performing direct numerical simulations (DNS). Two fuel compositions are considered, 50% methane (CH4) : 50% hydrogen (H2) (M05H05) and 80% CH4 : 20% H2 (M08H02) by mole to clarify the impact of the fuel composition on the flame behavior. The turbulent flames are examined by the reaction progress variable and conditionally averaged mass fractions of representative reactive species. The results suggest that the heat release in the burnt gas sides is substantial and the flames behave differently by the amount of H2 added to CH4. The conditional average of H2 mass fraction showed similar to a corresponding laminar flame for M05H05, whereas it showed large deviation for M08H02. Furthermore, OH radical and product species including carbon showed different behaviors from the laminar flames values for both cases. The results suggest the enhanced reactivity by hydrogen enrichment is pronounced further in the turbulent swirling premixed flames.