Abstract Flammable gases and liquids are widely used in industry and have serious leakage hazards. When a leaking gas cloud accidentally encounters an ignition source, it results in vapor cloud explosion accidents and multiple explosions. Pressure and flow field monitoring of a primary exploding spherical gas cloud and the secondary explosion of the gas cloud were conducted using the pressure acquisition system and schlieren system, and the impact of different influencing factors on exploding were analyzed. It was found that the larger the size of the primary exploding gas cloud, the smaller the distance between the primary exploding gas cloud and the secondary explosion gas cloud, and the larger the explosion intensity of the two gas clouds. Ignition on both sides of the primary exploding gas cloud was more likely to cause a blasting effect than was central ignition. The change in sparking ignition energy had no obvious effect on explosion propagation. When multiple gas clouds were exploding, the position of the primary exploding gas cloud had a considerable influence on the chain effect of exploding. If the primary exploding gas cloud was located in the middle of multiple gas clouds, interaction occurred between the primary exploding spherical gas cloud and the secondary explosion gas cloud because the angle formed by the secondary explosion gas cloud decreased, and the explosive intensity of the exploding gas cloud was higher. When the primary exploding gas cloud was on the side, the smaller the angle, the closer the lateral gas cloud was to the flame development path of the explosive gas cloud, which increased the likelihood of a blast and increased explosion intensity.

中文翻译：

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球形气体云爆炸连锁效应的影响因素

摘要 易燃气体和液体在工业中应用广泛，泄漏危害严重。当泄漏的气体云意外遇到点火源时，会导致蒸汽云爆炸事故和多次爆炸。利用压力采集系统和纹影系统对一次爆炸球形气云和二次爆炸进行压力和流场监测，分析了不同影响因素对爆炸的影响。发现一次爆炸气体云的尺寸越大，一次爆炸气体云与二次爆炸气体云之间的距离越小，两种气体云的爆炸强度越大。与中心点火相比，主爆炸气体云两侧的点火更有可能引起爆炸效应。火花点火能量的变化对爆炸传播没有明显影响。当多个气体云发生爆炸时，主爆炸气体云的位置对爆炸的连锁效应有相当大的影响。如果一次爆炸气云位于多个气云中间，二次爆炸气云形成的夹角减小，二次爆炸气云与二次爆炸气云发生相互作用，爆炸的爆炸强度降低。气云更高。当主爆炸气体云在侧面时，角度越小，