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半封闭条件下分岔管道中瓦斯爆炸的传播规律研究

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为研究半封闭条件下分岔管道中瓦斯爆炸的传播规律,在自制的瓦斯爆炸实验管道系统中进行瓦斯爆炸实验.实验对30°、45°、60°、90°、120°、135°和150°分岔管道进行研究,封闭情况为直管使用PVC半透膜封闭,支管使用亚克力板封闭.结果表明:半封闭管道中,亚克力板封闭端瓦斯爆炸压力增大,PVC封闭端爆炸压力减小.半封闭管道中,火焰的传播速度加快.当火焰锋面通过分岔角,在亚克力板封闭端,火焰速度突然发生下降,并出现火焰振荡现象.而在PVC薄膜封闭端,火焰锋面快速冲出管道.随着分岔角度的增大,半封闭管道中瓦斯爆炸压力和火焰传播速度均为先减小、后增大.
The Propagation Law of Gas Explosion in Bifurcated Pipelines Under Semi-closed Conditions
Aim to study the propagation law of gas explosion in bifurcated pipelines under semi closed conditions,and conduct gas explosion experiments in a self-made gas explosion experimental pipeline system,experiments were conducted on branching pipes at 30 °,45 °,60 °,90 °,120 °,135 °,and 150 °.The sealing conditions were that straight pipes were sealed with PVC semi permeable membranes,and branch pipes were sealed with acrylic plates.The results show that in a semi closed pipeline,the gas explosion pressure at the closed end of the acrylic plate increases,while the explosion pressure at the closed end of the PVC decreases.The flame propagation speed in a semi enclosed pipeline is accelerated first.When the flame front passes through the bifurcation angle and at the closed end of the acrylic plate,the flame speed suddenly decreases and flame oscillation occurs.However,at the closed end of the PVC film,the flame front quickly rushes out of the pipeline.As the bifurcation angle increases,the gas explosion pressure and flame propagation speed in the sem-closed pipeline first decrease and then increase.

semi-closedbifurcation pipelinepressureflame

温智、贺祥

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晋能控股集团浙能麻家梁煤业有限公司,山西 朔州 036000

半封闭 分岔管道 压力 火焰

2024

山西冶金
山西省金属学会 山西省有色金属学会

山西冶金

影响因子:0.139
ISSN:1672-1152
年,卷(期):2024.47(9)
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