Experimental study on combustion performance of centrally-staged swirl combustor
The effects of different gas supply schemes and with or without flame tube film cooling on the combustion performance of gas turbine centrally staged swirl combustor was studied by experimental method.The results show that:1)The film cooling treatment can significantly reduce the average outlet temperature and deteriorate the outlet temperature distribution;2)Both the fuel-air ratio and the air supply mode have a strong correlation with the combustion temperature in the flame tube space.When the value of the class equivalent is relatively large,the combustion temperature near the middle area is higher;3)Compared with the main combustion stage,the local equivalence ratio change of the pre-combustion stage has a greater impact on the NO and CO concentration at the outlet.4)Compared with no film cooling,CO emission increases significantly and NO emission decreases with film cooling.
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