柔性障碍物厚度对甲烷爆炸激励效应影响的实验研究

Experimental Study on Influence of Flexible Obstacle Thickness on Methane Explosion Excitation Effect

为了研究柔性障碍物对甲烷爆炸激励效应的影响,分别设计了无膜片、有0.09 mm膜片和有0.1 mm膜片的实验工况,通过爆炸压力峰值、火焰速度等特征参数,研究柔性障碍物的厚度对甲烷爆炸激励效应的影响。实验结果表明:加膜片后甲烷爆炸超压与火焰速度明显高于未加膜片;0.09 mm膜片和0.1 mm膜片的甲烷爆炸实验最大超压分别为0.53、0.6 MPa,增加膜片厚度,火焰速度峰值随之升高20.85%。同时利用激光纹影系统记录了膜片破裂后激波与火焰在流场中的传播过程。

In order to study the influence of flexible obstacles on methane explosion excitation effect,the experimental conditions without diaphragm,with 0.09 mm diaphragm and with 0.1 mm diaphragm were designed respectively.The influence of the thickness of flexible obstacles on methane explosion excitation effect was studied by characteristic parameters such as explosion pressure peak value and flame velocity.The experimental results show that the overpressure and flame velocity of methane explosion with film are significantly higher than those without film;The maximum overpressures of 0.09 mm diaphragm and 0.1 mm diaphragm are 0.53 MPa and 0.6 MPa respectively.With the increase of diaphragm thickness,the peak flame velocity increases by 20.85%.At the same time,the propagation process of shock wave and flame in the flow field after diaphragm rupture was recorded by laser schlieren system.