The higher ignition energy was and the higher flametravel speed would be.
点火能量越大，火焰传播速度也越大；
2
When the pipeline length and diameter ratio was certain, the flametravel speed of gas explosion and ignition energy would be in a quadratic function relationship.
在管道长径比一定时，瓦斯爆炸火焰传播速度与点火能量呈二次函数关系。
3
The flame will travel on Friday to ancient capital Xian, before heading to southern industrial hub Shenzhen on Saturday.