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工业部门大量存在着障碍物。实践证明,障碍物对加速燃烧和诱导爆炸具有非常重要的影响。为了深入研究障碍物与火焰之间的关系,本文基于湍流的k ε模型和改进的EBU Arrhenius燃烧模型,考虑了障碍物对流动的附加作用,通过修改方程的源项,建立了湍流加速火焰使火焰形状改变的理论模型。本文选用Simple格式,壁面边界层采用壁面函数法处理,模拟了火焰在含有障碍物的三维空间中的传播现象,其数值模拟得到的火焰形状与实验结果做了对比,结果表明本计算是成功的。最后,还分析了导致火焰变形的原因。
There are a large number of obstacles in the industrial sector. Practice has proved that obstacles to accelerate the combustion and induce explosions have a very important impact. In order to further study the relationship between obstacles and flames, this paper considers the additive effect of obstacles on the flow based on the k ε model of turbulence and the improved EBU Arrhenius combustion model. By modifying the source term of the equation, the turbulent accelerating flame is established The theoretical model of flame shape change. In this paper, the simple format is adopted, and the wall boundary layer is treated by the wall function method, which simulates the flame propagation in the three-dimensional space with obstacles. The flame shape obtained by the numerical simulation is compared with the experimental results. The results show that the calculation is successful . Finally, the cause of the flame deformation is also analyzed.