钝体表面有催化重整反应时对火焰稳定性影响的研究

利用钝体稳定火焰实验台，在不同工况下，测量了含水蒸汽的甲烷预混气的火焰吹熄速度.结果指出，在甲烷流量和水蒸汽流量一定的条件下，当钝体表面喷涂有催化剂时，将在表面处发生催化重整反应，产生部分氢气，从而使得火焰需要在更大的空气流速下才会被吹熄，有效地提高了火焰的稳定性.在改进SIMPLE算法的基础上，通过数值计算合理地模拟了该问题的实际情况，计算结果与实验结果在定性和定量的水平上都基本符合.

To Study the Influence of Catalytic Reforming Reaction in the Surface of Bluff Body on the Stability of the Flame

By the experimental bench of bluff body flame and under different working orders,the speed in blowing out the flame of methane premixing gas with vapour is measured. The result shows under a certain flow of methane and vapour and when there is catalyzer in the surface of bluff body, catalytic reforming reaction will take place in the surface and produce some hydrogem (H)so that the flame can be blown out with a much faster air speed and the stability of the flame has been effectively increased. Based on the improvement of the SIMPLE algorithm, the practical conditions of the problem are reasonably simulated by numerical calculation and the calculation results are basically in accordance with the experimental results in qualitaltive as well as quantification.