摘要
为进一步探究巷道截面变化情况下瓦斯爆炸传播规律的差异性,主要针对巷道截面突然缩小与巷道渐缩两种情况,对瓦斯爆炸传播动力特征进行Fluent数值仿真模拟。研究结果表明:突然缩小巷道内爆炸火焰的传播速度要明显大于渐缩巷道内爆炸火焰的传播速度。对于截面突然缩小巷道,瓦斯爆炸冲击波在巷道截面突变处峰值瞬间超压,达到最大值。对于截面逐渐变小巷道,爆炸冲击波峰值超压随着传播距离的增大而增大,但是整体上增大的幅度仍然不是很大。
To further explore the roadway cross-section variation under the condition of gas explosion propagation law differences, Fluent Numerical Simulation is used to simulate gas explosion propagation power characteristic mainly in two cases of the sudden narrowing of the roadway section and the gradual shrinkage of the roadway. The results showed that propagation velocity of explosive flame, which is suddenly reduced in roadway, is obviously higher than that in gradual shrinkage roadway. For the abrupt reduction of the cross section of the roadway, the peak overpressure of gas explosion shock wave instantaneously reaches its maximum value, in the roadway section of the mutation. For roadway section gradually decreasing, the peak overpressure of explosive blast wave increases with the propagation distance, but the amplitude of the explosion is still not great.
出处
《煤炭与化工》
CAS
2016年第4期1-3,共3页
Coal and Chemical Industry
关键词
瓦斯爆炸
传播规律
巷道截面
突然缩小
逐渐缩小
gas explosion
propagation law
roadway section
suddenly narrowing
gradually narrowing
