Abstract
To study effects of fuel flow rate and oxygen concentration on droplet combustion in micro-tube, following experiments were performed by using n-heptane as fuel in a quartz tube of 4mm internal diameter. It was found that, when equivalence ratio was fixed with 0.96, the air flow rate had a great effect on flame position and flame stability. If the fuel flow rate was less than 10 μL/min, there was no droplet on the capillary tip and flame can stably stay in the quartz tube. However, if the fuel rate was larger than 15 μL/min, droplet formed in the straight tube. When the flame stably stayed in the straight tube, the droplet had a great influence on the flame stability in tube. And when the flame was at the exit of the tube, evaporation of fuel film had a great impact on combustion, but droplet's dripping had little impact. At a fixed air flow velocity of 0.33 m/s, we changed oxygen concentration of inlet mixtures of air/oxygen. Increase of the oxygen concentration can reduce the ignition time and make flame stabilize easily in the tube.
| Original language | English |
|---|---|
| Publication status | Published - 2015 |
| Event | 10th Asia-Pacific Conference on Combustion, ASPACC 2015 - Beijing, China Duration: 19 Jul 2015 → 22 Jul 2015 |
Conference
| Conference | 10th Asia-Pacific Conference on Combustion, ASPACC 2015 |
|---|---|
| Country/Territory | China |
| City | Beijing |
| Period | 19/07/15 → 22/07/15 |
Keywords
- Flame stability
- Micro-scale combustion
- N-heptane droplet
- Oxygen concentration