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采用FLUENT软件对栅栏式排气阻火器的二维模型进行数值模拟,分析阻火器的阻火层厚度、栅栏间隙对淬熄距离和压力损失的影响。对模拟结果进行回归分析,得到了优化目标的回归模型;采用线性加权法合并淬熄距离和压力损失的回归模型,得到多目标函数;在一定约束条件下,对多目标函数进行最优求解。结果表明,阻火层厚度变大和栅栏间隙变小时,淬熄距离变小,压力损失变大;阻火层厚度为50 mm,栅栏间隙为0.25 mm时,栅栏式阻火器火焰淬熄距离和压力损失最小。
FLUENT software was used to simulate the two-dimensional model of barrier exhaust gas flame arrester. The influence of fire barrier thickness and fence clearance on quenching distance and pressure loss was analyzed. The regression model of the simulation results is obtained, and the regression model of the optimization objective is obtained. The regression model combining the quenching distance and the pressure loss is obtained by using the linear weighted method to obtain the multi-objective function. Under certain constraints, the multi-objective function is optimally solved. The results show that the flame quenching distance and pressure increase when the thickness of fire retardant layer becomes larger and the fence clearance becomes smaller, and the quenching distance becomes smaller and the pressure loss becomes larger. When the thickness of fire retardant layer is 50 mm and the fence clearance is 0.25 mm, Minimal loss.