Experimental Study on Low Pressure Modeling Combustion Characteristics of Axial Staged Combustor
In order to obtain the impact of low pressure modeling on the combustion characteris-tics of the combustor,provide a reliable method for cost saving and shortening the test cycle in the design and development of gas turbine combustors,a certain type of F-class gas turbine axial staged combustor was selected and low pressure modeling experimental research was conducted.The exper-imental results show that pressure has no significant effect on the distribution and numerical value of the total pressure loss coefficient in the combustor.The increase of pressure will reduce the wall temperature of the combustor liner,but has no obvious effect on the outlet temperature distribution.In addition,an increase in pressure can lead to an increase in NOx and NO emissions,as well as a decrease in NO2 emissions;When using pressure exponent to characterize the relationship between pressure and NOx emissions,it is found that the pressure exponent n fluctuates within the range of 0.264～0.269 under different modeling pressures;As the pressure changes,both CO and unburned hydrocarbon(UHC)emissions remain at extremely low levels.
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