Is it because of the exit velocity of the gas?
In: Engineering
I think thunderf00t on youtube recently showed this in practice when explaining what happend to spaceX rocket that exploded after it landed.
basically you need 3 things to make something burn: heat, fuel and oxygen in the container you only have fuel and it’s much higher pressure than the air around it so no air can flow in to the bottle since gas always flow from high pressure to low. these bottles also have valves that only let gas out one way and not the other.
if you don’t have a valve though, and only a hole you can only have a controlled flame as long as the gaspressure inside the bottle is higher than outside, but what will happen when enough of the gas has been let out is that air can start flowing in, and let the fire spread to the gas that remains in the bottle creating a burst of flames that can be quite big if the container is big enough
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