I'm designing a 2" x ~10"OAL feed manifold for feeding highly enriched nat. gas/O2 mixtures to a small scale burner. The incoming gas/air/O2 lines connect at the upstream end of the manifold. The initial FEMA analysis shows adequate venting through the burner to handle a normal deflagration-type flashback. My main concern however is the possibility of detonation and so I'm requesting input to the following questions:
(1) The flame front of course will self extinguish where the incoming gases mix but I'm mainly wanting to protect a detonation pressure wave from continuing to run up and damaging feed lines, flowmeters, etc. Do detonation arrestors also stop a shock wave from propogating through or do they funtion just to quench the flame front? For a few I've checked out, the normal flow pressure drops seem pretty low.
(2) Do rupture discs (or similar devices) respond quickly enough to mitigate a supersonic detonation wave?
(3) Considering the short 10" distance, is detonation a real concern even at say 50 - 100% O2? Most literature speaks of so many pipe diameters needed to transition to detonation but I'm assuming they're speaking mainly about air and not enriched mixtures.
Thanks in advance.
(1) The flame front of course will self extinguish where the incoming gases mix but I'm mainly wanting to protect a detonation pressure wave from continuing to run up and damaging feed lines, flowmeters, etc. Do detonation arrestors also stop a shock wave from propogating through or do they funtion just to quench the flame front? For a few I've checked out, the normal flow pressure drops seem pretty low.
(2) Do rupture discs (or similar devices) respond quickly enough to mitigate a supersonic detonation wave?
(3) Considering the short 10" distance, is detonation a real concern even at say 50 - 100% O2? Most literature speaks of so many pipe diameters needed to transition to detonation but I'm assuming they're speaking mainly about air and not enriched mixtures.
Thanks in advance.