民用飞机全航线排放预测

针对民用飞机全航线的排放预测问题,运用飞机升阻特性模型、发动机性能模型和飞机航线性能模型计算了民用飞机在全航线上的飞机升阻特性与发动机性能,并将以上模型与基于T3-p3法与波音流量法所建立的排放计算模型相耦合,详细计算了飞机在实际飞行过程中未燃碳氢化合物(UHC)、一氧化碳(CO)、氮氧化合物(NOx)的排放指数,并得到了全航线的各种污染排放物排放总量,完善了民用航空发动机排放预测分析体系,为低污染民用航空发动机的设计与评估提供理论依据.计算结果表明,飞机处在起飞以及爬升阶段时,NOx的排放指数较高,而UHC与CO的排放指数较低;当飞机处在下降以及进场时,NOx的排放指数较低,而UHC与CO的排放指数较高.NOx的总排放量在3种污染排放产物中最高.

Prediction of civil aircraft emission in complete flight route

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.