氢燃料阵列微管扩散燃烧器燃烧特性实验研究

In order to explore the influence of key structural parameters on the combustion performance of a hydrogen-fuelled microtube diffusion combustor，a unit-level experimental platform with heating and monitoring functions was constructed，and experiments on the combustion characteristics of a microtube diffusion flame were systematically carried out. The effects of hydrogen nozzle diameter，microtube spacing，air and fuel nozzle arrangement，and inlet temperature on combustion noise，oscillation behaviour，and NO_x emission were investigated by designing several groups of controlled experiments. The experimental results show that：increasing the orifice diameter reduces the combustion noise（about 10 dB）and NO_x emission to a certain extent；the flame interference is enhanced when the microtubule spacing is reduced，and the noise increases，but it helps to reduce the emission under the low-pressure drop condition；the forked arrangement of orifices enhances the turbulent mixing，but it causes an increase in the noise and the emission；the heated condition significantly enhances the NO_x generation rate，and the emission and the adiabatic flame temperature exhibit an exponential relationship with strong correlation（adjusted R² >0.99）.