Abstract
The characteristics of microscale combustion were investigated by using a microchannel heated by an external source. The inner diameter of the channel was 2 mm, which was slightly smaller than the quenching distance of the stoichiometric methane-air mixture under normal conditions. The effects of the equivalence ratio and the averaged flow velocity on the characteristics of combustion in the microchannel were examined. At a channel-wall temperature of ≈1000°C, flames could be stabilized at equivalence ratios of 0.05-1.9 and mixture velocities up to 150 cm/sec in a U-shaped quartz-glass channel. At moderate equivalence ratios and lower velocity conditions within the flammability region, oscillatory combustion was observed. A simple analytical model predicting flame oscillations on the basis of the linear analysis of steady solutions is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 516-523 |
| Number of pages | 8 |
| Journal | Combustion, Explosion and Shock Waves |
| Volume | 40 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2004 Sept |
Keywords
- Excess enthalpy combustion
- Microcombustion
- Swiss roll burner