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- W4367186483 abstract "Laminar flames of highly diluted methane in a non-premixed co-flow configuration have been studied experimentally and numerically for two burners with different diameters. As the fuel is highly diluted methane, the oxidizer stream is oxygen-enhanced to get a stable anchored or lifted flame. Two different diluents, i.e., helium and nitrogen are used in the fuel stream, and the flame structure turns out to be notably different for these two cases. The nitrogen-diluted flames exhibit almost anchored nature. However, a helium-diluted flame can be stable at a lifted position despite having a less than unity Schmidt number (Sc). A higher propagation speed helps the helium-diluted flames to sustain till a lower oxygen percentage compared to nitrogen-diluted flames. The helium flames have a much higher positive buoyancy effect resulting in a higher lift-off height than nitrogen-diluted flames. On the other hand, varying the burner diameter from 4 mm to 9 mm shifted the flames from momentum-controlled regime to buoyancy-controlled regime, which attributed to the higher lift-off height for 4-mm burner flames for both helium and nitrogen cases. Apart from the lift-off height, the nature of the flame length is also explored for flames with both diluents. The structure of the flame – whether anchored or lifted – is also found to affect the variation of flame length with variation in oxygen percentage in the co-flow." @default.
- W4367186483 created "2023-04-28" @default.
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- W4367186483 date "2023-09-01" @default.
- W4367186483 modified "2023-09-27" @default.
- W4367186483 title "Flame structure and stability for oxygen enhanced non-premixed combustion of highly diluted methane with helium and nitrogen" @default.
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- W4367186483 doi "https://doi.org/10.1016/j.fuel.2023.128469" @default.
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