矿用防爆柴油机栅栏式排气阻火器结构优化
Structure Optimization of Fence-type Exhaust Flame Arrester of Mine Explosion-proof Diesel Engine
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摘要: 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。Abstract: We use FLUENT software to simulate the two-dimensional model of exhaust flame arrester, and analyze the influence of the thickness of flame fence and the gap of the fence on the quenching distance and the pressure loss. By regression analysis, we obtain the regression model of the optimization objective, also obtain the multiple objective function by using the linear weighted method combined with the regression model of quenching distance and pressure loss, and carry out the optimal solution of multi-objective function under the condition of certain constraints. The results show that the quenching distance becomes small and the pressure loss becomes large when fire retardant layer thickness becomes larger and fence gap becomes smaller; the flame quenching distance and pressure loss of fence type arrester is the smallest when fire retardant layer thickness is 50 mm and fence gap is 0.25 mm.
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