DJ 2700 is oxygen temperature important?
Hello dear forum members,
I am a newbie in HVOF. Discovered this greatly forum recently.
We have a DJ 2700 in our lab. We use propane (not very pure, containing some high-boiling-point components) as the fuel and use a vaporizer to transform it from liquid from gas. Thus the propane temperature supplied to the gun can be 50 or higher (I guess up to 70C according to hand feeling).
My concern is that, since propane mixes with oxygen in the gun, does oxygen "quench" the hot gaseous propane back into liquid, creating propane mists? My place can be pretty cold in the winter (2 to 5 degrees C). Will this cause problem in ignition or sustaining of the supersonic flame? Actually our gun does not ignite very well now and I am guessing if this is because of the "colder" oxygen.
Does anyone have experiences on pre-warming oxygen in cold days?
Any advise is greatly appreciated.
Thomas
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