定容燃烧弹中预混湍流燃烧的数值模拟

A New Premixed Turbulent Combustion Model for Constant Volume Combustion Bomb

发展了一种新型预混湍流燃烧的数值模型．该模型基于准维模型的基本思想，摒弃了湍流燃烧速度模型，以数值生成的湍流场对火焰前锋面的客观影响推动燃烧计算过程，消除了人为经验的作用．利用模拟得到的湍流速度场，实现了对火焰几何形状的二维模拟．利用该模型，计算和讨论了当量燃空比分别为０．９和０．７时，定容燃烧弹中预混湍流燃烧的特点，以及湍流强度和湍流标尺对燃烧的影响．模型的模拟结果和实验结果有很好的吻合性，这说明模型是合理的．

A new quasi dimensional model is developed for premixed turbulent enhanced combustion of a constant volume bomb. The turbulent velocity field is formed to be governed by the flame front rather than the flame speed, thus eliminating the choice of the analysts who models the process. Obtained are characters of the two dimensional flame geometry under the various turbulence intensity and turbulence length scale with equivalence ratio of 0.9 and 0.7. Agreement between the analytical model and experimental finding is satisfactory.