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为了研究交错障碍物对瓦斯爆炸火焰形状、火焰速度及爆炸压力的影响,设计并搭建了150mm×150mm×500mm半封闭透明腔体的瓦斯爆炸实验台,采用化学当量比浓度的甲烷-空气预混气体,并与平行障碍物工况进行了比较.实验结果表明:与平行障碍物相比,交错障碍物明显增强了火焰形变,提高了火焰速度和爆炸压力,其中火焰速度和爆炸压力的提升率最高分别达到78.0%和198%.因此,在实际巷道中,应尽量避免障碍物的交错放置.
In order to study the influence of staggered obstacles on the flame shape, flame speed and explosion pressure of gas explosion, a gas explosion experiment bench of 150mm × 150mm × 500mm semi-closed and transparent cavity was designed and constructed. Methane-air premixed with chemical equivalent concentration Gas and compared with the parallel obstacles.The experimental results show that compared with the parallel obstacles, the staggered obstacles significantly enhance the flame deformation and increase the flame velocity and explosion pressure, of which the flame velocity and explosion pressure increase rate The highest respectively 78.0% and 198%, therefore, in the actual roadway, should avoid the staggered placement of obstacles.