微型圆管内氢气/甲烷/空气催化燃烧实验  

Experiments on hydrogen/methane/air catalytic combustion in micro tube

作　　者：周明月[1] 杨卫娟[1] 邓尘[1] 周俊虎[1] 刘建忠[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2015年第12期2276-2281,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51336010);浙江省自然科学基金资助项目(Y12E060031);中央高校基本科研业务费专项资金资助项目(2014FZA4013)

摘　　要：在石英玻璃管和陶瓷管组成的圆管微燃烧器内进行氢气/甲烷/空气的催化燃烧实验,研究混合比、当量比和入口流速等对稳燃范围、火焰特性、壁面温度和壁面散热量的影响.实验结果表明,维持稳定燃烧的入口流速下限随混合比的增大而减小,但随当量比的增大而先减小后增大;在混合比为0.9、当量比为1.6的工况下,可以在0.25~19.00m/s的入口流速下实现稳定燃烧,且此时壁面温度最高、热回流区域最长.火焰在2个催化区域内分为2层,且随着混合比的增大,火焰锋面变为倾斜的锥形、根部向下游移动.壁面散热量随混合比和入口流速的增大而增大,散热率却随混合比的增大而增大,随入口流速的增大而减小.壁面辐射散热占总散热量的比例也是先增大后减小,在当量比为1.6时达到最大值63.93%.Experiments on hydrogen/methane/air catalytic combustion were carried out in a micro combustor composed of a quartz glass tube and a ceramic tube. The experiments mainly focused on the effects of mixing ratio, equivalence ratio and inlet flow rate on the stable combustion range, flame feature, wall temperature and the heat loss of tube wall. The experimental results show that the lower limit of stable combustion inlet flow rate decreases when the mixing ratio increases, while it decreases firstly and then increases with the increase of equivalence ratio. In the condition of that the mixing ratio is 0.9 and the equivalence ratio is 1.6, the flame could realize stable combustion as the inlet flow rate varied from 0.25 to 19.00 m/s. Simultaneously, the highest wall temperature and maximum length of heat recirculation zone are achieved. Two layers of the flame can be observed in two catalytic zones, the front of the flame becomes inclined cone-shaped and its root moves downstream with the increase of mixing ratio. The heat loss of the tube wall increases with the increase of mixing ratio and inlet flow rate, and heat loss rate increases with the increase of mixing ratio and decreases with the increase of inlet flow rate. Radiative heat loss accounting for the proportion of the total heat loss increases firstly and then decreases with the increase of equivalence ratio, and reaches the maximum of 63.93% when equivalence ratio is 1.6.

关 键 词：微圆管 催化燃烧 氢气/甲烷/空气 

分 类 号：TK91[动力工程及工程热物理]