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航空发动机污染物排放量估算方法

, PP. 53-61

Keywords: 航空发动机,污染物排放,排放指数估算,性能退化,性能模型

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Abstract:

借助发动机性能模型,研究了发动机性能退化对氮氧化物(NOx)、一氧化碳(CO)、未燃碳氢化合物(UHC)与碳烟颗粒(Soot)排放的影响,提出了基于飞行参数与发动机性能模型的污染物排放总量估算方法。利用ICAO排放数据拟合得到发动机地面状态下的参考排放指数,利用相对法模型得到飞行状态下的排放指数,根据航班飞行参数和发动机性能模型估算航班污染物排放总量。研究结果表明性能退化对污染物的排放指数影响较大,仅考虑进对燃油消耗量的影响,性能退化对NOx排放总量的影响较小,但会引起CO、UHC与Soot排放总量的上升。执行中短途航班的双发民航飞机的NOx排放总量最高约为100kg,其次为CO,约为20kg,而UHC和Soot的排放总量较低,小于1kg。老化发动机的CO、UHC与Soot的排放总量增加约为10%,而NOx排放总量增加约为2%。

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