【摘要】 以长6m、管径 159×7的钢管为实验装置,进行了管内乙炔和空气爆炸实验.结果显示,随着气云长度的增加,爆炸最大压力明显升高.建立了描述管内气云爆炸的理论模型,采用SIMPLE算法进行了数值求解.计算结果与实验值相比较,最大偏差为19 7%,平均偏差为6 33%.对长100m的管内甲烷和空气爆炸威力进行了预测,当气云长为10m时,最大压力发生在轴向55m处,可达323kPa.更多还原

【Abstract】 Experiments of ethyne/air cloud explosion were conducted in 159×7 steel tube. The results show that the greatest pressure of explosion increases with the length of cloud obviously. Theoretical model of flammable cloud explosion was established and solved by SIMPLE algorithm. Compared with the test data, the maximum and average deviations of calculation results were 19.7% and 6.33%. In addition, the power of methane/air cloud explosion in 100 m tube was forecasted, when the length of cloud was 10 m, the greatest pressure could reach 323 kPa at the point of 55 m from ignition.更多还原