In a burner which essentially comprises {HEAD ~ a swirl generator} for a combustion air flow and means for injecting {TAIL ~ a fuel} into the combustion air flow , a mixing section is arranged downstream of the abovementioned swirl generator 
In a burner which essentially comprises { HEAD ~ a swirl generator } for a combustion air flow and means for injecting { TAIL ~ a fuel } into the combustion air flow , a mixing section is arranged downstream of the abovementioned swirl generator
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH