[TheForge] Building a propane forge

Thu Feb 19 16:57:01 2004

In a message dated 2/19/2004 12:23:35 PM Pacific Standard Time, 
[email protected] writes:
Mike:

When you say "swirl" I assume you're referring to vortices. Are you referring
to numerous turbulence vortices or a tube length vortex?

I love Vortices, they're SO useful once harnessed.
Believe it or not I hadn't even consciously considered that it constitutes a 
vortex, but yes I do mean the creation of a vortex running the length of the 
mixing tube. Some of my early experiments with the 1 1/4" burners had the flame 
still swirling as it left the nozzle, so that it spread at about 20 degrees 
inclusive and was no longer than it was wide. This would be good, except that 
it wasn't sufficiently stable. I lengthened and narrowed the air intakes in 
order to back off this overly wild flame. But, the example shows just how dynamic 
the process can get. At one point I even called them swirl burners, but 
thought it too dramatic. In the smaller diameter mixing tubes the swirl is weaker, 
and their performance is harder to bring up to the mark. The largest diameter 
burner had to be choked back a lot. Apparently the greater diameters tend to 
run pretty wild. 1 1/2" scared me to death. 2" would probably cause a leak in 
my plumbing <G>

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