障碍物对油气-空气混合气体泄压爆炸火焰传播特性影响

发布时间：2018-05-09 13:24

本文选题：油气混合物 + 泄压爆炸　；参考：《中国安全生产科学技术》2017年01期

【摘要】：为了研究障碍物对油气泄压爆炸火焰传播特性的影响规律,进行了不同数量障碍物工况下的对比实验,并利用纹影仪和高速摄影仪记录了火焰传播过程,针对障碍物对火焰形态、火焰锋面位置及火焰传播速度的影响规律进行了研究,结果表明:圆柱体障碍物会导致油气泄压爆炸火焰形态产生褶皱和弯曲变形,诱导层流火焰向湍流火焰转变,加速火焰的传播,对油气泄压爆炸火焰的初始传播形态有显著影响;随着障碍物数量的增多,火焰锋面传播距离点火端的最大距离增大,但到达最远距离的时间减少;障碍物能够增强火焰的传播速度,尤其对障碍物下游火焰影响最为显著,随着障碍物数量的增多,火焰传播的最大速度也随之增大,但达到最大火焰传播速度的时间却随之减少;障碍物的存在增大了油气泄压爆炸过程外部爆炸压力,并且随着障碍物数量的增多,外部爆炸压力峰值增长幅度增大。
[Abstract]:In order to study the influence of obstacles on the flame propagation characteristics of oil and gas pressure release explosion, a comparative experiment was carried out under different conditions of obstacles, and the flame propagation process was recorded by using a schlieren and a high speed photograph. The effects of obstacles on flame morphology, flame front position and flame propagation velocity are studied. The results show that cylinder obstacles can lead to fold and bend deformation of flame shape in explosion of oil and gas pressure release. The laminar flow flame is transformed into turbulent flame, and the flame propagation is accelerated, which has a significant effect on the initial propagation pattern of the explosion flame, and with the increase of the number of obstacles, the maximum distance between the flame front propagation and the ignition end increases. However, the time to reach the furthest distance is reduced; the obstacle can increase the velocity of flame propagation, especially the influence on the flame downstream, and the maximum velocity of flame propagation increases with the increase of the number of obstacles. However, the time to reach the maximum flame propagation velocity decreases, and the external explosion pressure increases with the increase of the number of obstacles, and the increase of the peak value of the external explosion pressure increases with the increase of the number of obstacles.
【作者单位】：后勤工程学院供油系;
【基金】：国家自然科学基金项目(51276195) 重庆市研究生科研创新项目(CYB16128)
【分类号】：X932

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