Help with flame arrestor
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I would like to ask: The flame propagation speed inside a flame arrester depends on the properties of the combustible gas and the distance between the ignition point and the flame arrester (i.e., the ignition distance). The flame propagation speed of the same gas increases rapidly as the ignition distance increases. What is the relationship between that ignition distance and the flame propagation speed? For example, if the medium is a mixture of hydrogen and air, what is the flame propagation speed when ignition occurs 3 meters away from the flame arrester? What about 4 meters and 5 meters? Is there some formula or empirical value that can determine its flame propagation speed? Thank you all for helping me clear up my doubts.
The design specifications for flame arrestors state that the flame speed is related to operating conditions (temperature, pressure, and pipe diameter, as well as pipe length, shape, and installation location); if this information is not available, actual measurements must be taken. Calculating the estimate is difficult
The propagation of flames or explosions occurs in two ways: one is deflagration (propagation at subsonic speeds), and the other is detonation (propagation at supersonic speeds, up to several kilometers per second). It takes a certain distance for deflagration to transform into detonation; this is why the speed of flame propagation within a flame arrester depends on the distance between the ignition point and the arrester (i.e., the ignition distance). Detonation is highly destructive, so it is necessary to prevent deflagration from turning into detonation