地面放空管道内瓦斯爆炸传播特性研究
Study on Propagation Characteristics of Gas Explosion in Ground Exhausting Pipeline
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摘要: 为研究地面放空管道内瓦斯爆炸的转播特性，模拟地面放空管道内瓦斯的爆炸环境，对管道内气体的爆炸极限、爆炸压力和爆炸火焰传播速度等进行实验分析。结果表明，在实验管道内，爆炸冲击波冲量在爆炸初期逐渐增大，达到最大值后，又逐渐减小，在靠近实验管道开口位置，冲量又突然增大。爆炸压力随实验管道的延长而增大，在靠近实验管道的开口端达到最大值。瓦斯浓度低于9%时，爆炸火焰传播速度随浓度降低而减小；瓦斯浓度高于11%时，火焰传播速度随浓度增大而减小。Abstract: To study the characteristics of gas explosion in ground exhausting pipeline, gas explosion environment in ground exhausting pipeline is simulated, and the explosion limit of gas pipeline, explosion pressure and flame propagation velocity are analyzed by test. The results showed that in the experimental pipeline, the blast wave impulse increased gradually in the initial explosion, and reached the maximum later, and gradually decreased, and then the impulse suddenly increased near the experimental pipe opening position. Explosion pressure increases with the extension of experimental pipeline, and reaches the maximum at the opening end which is close to the experimental pipeline. The gas concentration is lower than 9%, and the flame propagation velocity decreases with decreasing concentration; gas concentration is higher than 11%, and the flame propagation velocity decreases with the increase of concentration.
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