论文部分内容阅读
为探索碳酸氢钠粒径的变化对铝粉火焰结构变化和火焰传播特性的影响,采用竖直粉尘燃烧管道实验平台,研究惰化剂质量分数为30%的惰化条件下的火焰传播过程,并记录火焰温度。实验结果表明:碳酸氢钠粉体能显著降低火焰强度,钝化火焰前端;且粉体对铝粉火焰温度的抑制作用与其粒径成反比关系;碳酸氢钠粒径对铝粉火焰传播速度的惰化抑制作用在微米级与其粒径成反比关系,其粒径越小,对铝粉火焰最大传播速度的抑制效果越好。
In order to explore the effect of the change of sodium bicarbonate particle size on flame structure and flame propagation characteristics of aluminum flames, a vertical dust burning pipeline experiment platform was used to study the flame propagation process under the inerting condition with inert mass fraction of 30% And record the flame temperature. The experimental results show that: sodium bicarbonate powder can significantly reduce the flame strength, blunt the flame front; and powder inhibition of aluminum flame temperature and its particle size is inversely proportional to the relationship; sodium bicarbonate particle size of aluminum flame propagation velocity The inerting inhibition effect is inversely proportional to the particle size at the micron level. The smaller the particle size, the better the suppression effect on the maximum propagation velocity of aluminum flame.