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对采用Realizable k-ε湍流模型三维多台阶旋流燃烧器甲烷的非预混燃烧流动进行了数值模拟,分析了台阶数、轴向速度比、进口温度和旋流数等参数对三维多台阶旋流燃烧器的湍流热态流场的影响。结果表明:增大台阶数,总压损失下降;增大轴向速度比,燃烧效率下降,整体温度降低,出口径向温度分布均匀性变差;增大进口温度,可以显著提高燃烧效率和出口径向温度分布均匀性及整体温度;增大旋流数,燃烧效率和整体温度都增大,径向出口温度分布均匀性变好。
Non-premixed combustion flow of three-dimensional multi-stage cyclone combustor using Realizable k-ε turbulence model was numerically simulated. The effects of the number of steps, axial velocity ratio, inlet temperature and the number of swirl on the three- Effect of Turbulent Hot Current Field on Flow Burner. The results show that increasing the number of steps reduces the total pressure loss. Increasing the axial velocity ratio reduces the combustion efficiency and the overall temperature decreases, and the uniformity of the outlet radial temperature distribution becomes worse. Increasing the inlet temperature can significantly improve the combustion efficiency and The radial distribution of temperature uniformity and the overall temperature; increase the number of swirl, combustion efficiency and the overall temperature increases, the radial outlet temperature distribution becomes better.