To predict the emission of civil aircrafts in complete flight routes

the aircraft lift-to-drag characteristic model

engine performance model and flight routes performance model were adopted to calculate the aircraft lift-to-drag characteristic and engine performance in complete flight routes.The above models were combined with the established emission calculation model based on T3-p3 method and Boeing method to calculate the emissions index of unburned hydrocarbons (UHC)

carbon monoxide (CO)

nitrogen oxides (NOx) and the total emissions in the aircraft flight routes.These models could improve the civil aviation engine emission prediction analysis system and provide a theoretical basis for the design and evaluation of the low pollution civil aviation engine.The results show that the emission index of NOx is high while the emission index of UHC and CO are low when the aircraft takes off and climbs

the emission index of NOx is low while the emission index of UHC and CO are high when the aircraft approaches and lands off

and the total mass of NOx is higher than the other two emission products.