The method 1, further comprising emitting said flame wherein the point of exit of the flame taken perpendicular to the longitudinal axis of {HEAD ~ the flow} of {TAIL ~ the flame} is essentially non circular 
of
The method 1 , further comprising emitting said flame wherein the point of exit of the flame taken perpendicular to the longitudinal axis of { HEAD ~ the flow } of { TAIL ~ the flame } is essentially non circular
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH