基于化学自发光技术的喷射火相互作用研究

Study on interaction of jet flames based on chemiluminescence technology

用自行设计的多点源气体火焰燃烧试验平台以及化学自发光成像测试系统,研究了两动量控制的湍流射流火焰分别处于不存在相互作用的状态、存在相互作用但不合并的状态、部分合并的状态及完全合并的状态下化学自发光的强度二维分布。实验发现,当处于存在相互作用但不合并状态下,两射流火焰在相交处出现自发光强度凹陷区,并且随着火焰逐渐合并,强度逐渐增强,凹陷区逐渐消失,直到完全合并状态下强度约为不存在相互作用状态时的两倍。

By using the self-designed multi-point source gas flame combustion test platform and the chemical spontaneous light imaging test system, the two-dimensional distribution of chemiluminescence intensity in the momentum variable turbulent jet flames which are in the state of no interaction, interacting but no combination, partial merger and complete merger were researched respectively. It is found that the intensity of chemiluminescence drop markedly at the intersection of the two jet flames in the state of interacting but no combination. With gradual merger of the flames,the intensity increases and the depression area disappears gradually, and finally the peak intensity is twice as strong as when there is no interaction.