关键词: 燃烧室;多工况;碳黑分布;数值计算;湍流燃烧

Abstract: In order to study the working conditions of small reflux combustor under different conditions and analyze the causes of carbon deposition, k-ε turbulence model, EDC combustion model are used to simulate the flow field of the combustor. The results show that the calculated values of the parameters of the combustor are in good agreement with the bench test data. The relative error of the parameters in each state is less than 1.37%. According to the temperature distribution of each working condition, it is found that the flame of the combustor gradually shrinks toward the head of the flame tube as the working condition decreases. The evaporation rate of the fuel in the evaporation tube of each working condition was calculated, and it was found that the evaporation rate was significantly reduced under low working conditions. According to the temperature distribution of the outlet, the outlet temperature distribution coefficient (OTDF) was calculated to be 0.35. According to the distribution of carbon black, it is found that the carbon deposit is mainly in the head of flame tube, mainly due to insufficient combustion and lack of cooling film.

Key words: Combustor;Multi-station;Carbon black particles distribution;Numerical calculation;Turbulent combustion