FU Zhongguang, SONG Jiasheng, SHI Li, et al. Influence of pilot fuel ratio on NOx generation characteristics in the can-annular combustion chamber[J]. Thermal power generation, 2018, 47(4): 63-69.
FU Zhongguang, SONG Jiasheng, SHI Li, et al. Influence of pilot fuel ratio on NOx generation characteristics in the can-annular combustion chamber[J]. Thermal power generation, 2018, 47(4): 63-69. DOI: 10.19666/j.rlfd.201706056.
The numerical simulation was used to analyze the NO_x generation rules in the can-annular combustion chamber.The distributions of flow field
temperature field and thermal NO_x generation rate in the combustion chamber were obtained by changing the pilot fuel ratio.The results show that
the axial velocity near the chamber central axis increases with the pilot fuel ratio
and the velocity in other areas shows little change.The increase in the temperature of the pilot flame widens the high temperature region near the central axis
which promotes the formation of thermal NO_x.And its high rate range coincides with the high temperature region.Therefore
decreasing the pilot ratio when it is in the range from 4.0% to 5.5% is beneficial to reduce the NO_x emission.