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