烷烃燃料微小平板催化燃烧的火焰特性

对微平板燃烧器内4种烷类燃料（C₁ ~ C₄）进行铂催化燃烧实验,获得其点火过程和静态火焰的特征,并进行对比分析。当量比相同时,点火过程火焰传播速度大小顺序为甲烷 > 乙烷 > 丁烷 > 丙烷。随着当量比增大,火焰传播速度加快,稳态火焰根部位置向气流上游移动。观察可见光、430 nm（OH*光谱）、516 nm（C₂*光谱）成像火焰发现,当量比越大,火焰亮度越大,OH*和C₂*浓度越高。当量比相同时,乙烷的OH*、CH*和C₂*浓度最高,而甲烷和丙烷的则较低。

Flame Characteristics of Catalytic Combustion of Alkane Fuels in Micro-Flat Combustor

Combustion of four alkane fuels (C₁ ~ C₄) in a micro-plat combustor catalyzed by Platinum were performed to studied their ignition process and static flame. When with a same equivalent ratio, the order of the flame propagation velocity was methane > ethane > butane > propane. The propagation velocity increase with the equivalent ratio, and the steady-state flame root position of the fuels move upstream of the airflow. Flame images of the visible light, 430 nm (OH* spectrum), 516 nm (C₂* spectrum) were observed, and it was found that, the larger the equivalent ratio was the greater the flame intensity was in the same fuel, and the concentration of OH* and C₂* were higher. Under the same equivalent ratio condition, the OH*, CH*, and C₂* concentrations of ethane were the highest, while the concentrations of methane and propane were lower.