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On 11/7/14, 2:19 PM, John F. Cooper III wrote:
Quenching with compressed air works great. Compressed nitrogen works
noticeably better.
I have constructed 'manifolds' from acrylic tubing which direct the air
blast right where the electrodes spark. Pressures beyond ~90 psi elicit
no noticeable improvement.
How big was your orifice? Are you in a choked/sonic flow regime? As
you move into choked flow, increasing the pressure doesn't increase the
flow, because of shock wave forming in the throat.
When the absolute pressure ratio across the orifice is >1.89 (about
28psia if the downstream side is at 15 psia), then the possibility of
choked flow exists.