کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6468365 | 1423564 | 2016 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Suppression of instabilities in a premixed methane-air flame in a narrow channel via hydrogen/carbon monoxide addition Suppression of instabilities in a premixed methane-air flame in a narrow channel via hydrogen/carbon monoxide addition](/preview/png/6468365.png)
The effects of hydrogen and carbon monoxide addition on premixed methane/air flame dynamics in a heated narrow channel are numerically investigated using a time accurate, compressible flow solver along with the DRM-19 reaction mechanism. By adding a small amount of either H2 or CO, flame instabilities present for the pure CH4/air combustion in the form of flame-extinction and re-ignition could be effectively suppressed. This suppression can be attributed to a few important elementary reactions, that play a dominant role in contributing to the heat release rate, getting enhanced with H2 or CO addition. This leads to a higher flame propagation speed and a shorter flame-extinction period, and eventually leads to flame stabilisation after a few cycles of spatial oscillations.
Journal: Combustion and Flame - Volume 173, November 2016, Pages 266-275