正丁烷/空气混合气催化点火的实验研究  

Experiment Study on Catalytic Ignition of n-Butane/Air Mixtures in the Micro-reactor

作　　者：辛昉 钟北京[1] 

机构地区：[1]清华大学航天航空学院,北京100084

出　　处：《工程热物理学报》2017年第4期890-893,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51276096)

摘　　要：本文在通道高度分别为2 mm和4 mm的平板微反应器内进行了正丁烷/空气混合气的催化燃烧实验。结果表明,在入口流速以及燃烧室高度相同的情况下,催化起燃温度随当量比的增加而下降,且稳定燃烧时最大放热量出现在混合气当量比略大于1时。实验中并未发现明显的气相着火现象。在入口流速以及当量比相同的条件下,混合气在通道高度4 mm的反应器内的起燃温度低于2 mm反应器,表明气相扩散对催化起燃可能产生了一定的影响。In this paper,the catalytic ignition of n-butane/air mixture is studied experimentally in a planar micro-reactor with the height of 2 mm and 4 mm.Results show that the catalytic ignition temperature decreases with increase of the equivalence ratio for the same reactor at same flow rate,and the maximum heat release at steady combustion occurs when the equivalence ratio is slightly greater than 1.The phenomenon of gas-phase ignition is not found in the experiment.It is also found that the catalytic ignition temperature of the mixture with the same equivalence ratio in the4 mm-reactor is lower than that in the 2 mm-reactor at the same flow rate,which indicates that the gas-phase diffusion may have a significant effect on the catalytic ignition.

关 键 词：催化着火 起燃温度 微反应器 正丁烷 当量比 

分 类 号：TK16[动力工程及工程热物理—热能工程]