Abstract
The thermal oxidation together with ignition and combustion characteristics of crystalline boron particles under different airflow velocity were studied by means of thermogravimetry analysis and a laser ignition apparatus. The effect of heat convection was analyzed based on experimental results. The results reveal that influence of airflow velocity on oxidizing reaction is mainly reflected in form of heat convection and diffusion control. The influence mechanism of airflow velocity on the ignition and combustion process is complex. When at a low level, the increase of airflow velocity promotes the ignition and combustion process, which is limited by oxygen diffusion process. As the velocity increases, the influence of heat convection on the boron oxidation process is gradually strengthened. When exceeding a certain value, the increase of airflow velocity isn't benefit to the ignition and combustion. The results also show that combustion efficiency of boron particles increases monotonically as the airflow velocity increases. It is inferred that the combustion efficiency is mainly limited by oxygen diffusion process.
| Original language | English |
|---|---|
| Pages (from-to) | 511-515 |
| Number of pages | 5 |
| Journal | Guti Huojian Jishu/Journal of Solid Rocket Technology |
| Volume | 36 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
Keywords
- Boron
- Combustion
- Ignition
- Thermogravimetry