Experimental Study on the Flame Propagation Speed and Overpressure under Obstacles
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摘要:通过增加有机玻璃管的长度，在布置障碍物的情况，研究了不同的长径比（L/D）处火焰传播速度、超压的变化情况。研究结果表明：障碍物的存在使火焰的传播速度、超压提高，在长径比L/D=20时火焰传播速度急剧增加；浓度越接近化学计量比，障碍物对火焰的加速作用越显著、超压越大。研究结果对于如何防治瓦斯和其它可燃气体爆炸，减轻爆炸威力具有一定的指导意义。
Abstract:By prolonging the transparent organic glass tube，the flame propagation velocity and overpressure are researched under obstacles. The result shows that obstacles increase the flame propagation velocity and overpressure，the velocity increases quickly at 20 times L/D ratio. The closer the gas concentration to the stoichiometrical ratio, the more obvious the accelerating effect of the obstacles on the flame velocity and overpressure. These results may be useful in the field of preventing and controlling combustible gas explosion.
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