航空器巡航阶段空气污染的排放和扩散

为了探索航空器巡航阶段的排放和扩散，本文假设航空器巡航阶段推力为其最大推力的70％，以国际民航组织（International Civil Aviation Organization，ICAO）发动机排放数据库中的GEnx-2B67/P发动机氮氧化物（NOx）的排放为例，利用全空域航空排放评估系统（System for Assessing Aviation’s Global Emissions，SAGE）进行数值仿真，计算得到飞行方向上的排放强度。然后假设飞行方向为恒定的线源排放方向，且与风向垂直，基于高斯扩散模型，得到航空器巡航阶段的污染扩散模型。最后采取ICAO在2012 年美国俄亥俄州Peebles数据，对NOX浓度扩散进行数值仿真，成功计算出当时当地GEnx-2B67/P发动机在巡航状态下飞机排放的NOX浓度分布情况。

Air Craft Cruising Phase Air Borne Pollutant Emission and Dispersion

To study aircraft cruise phase emission, its thrust level was assumed to be set at 70% of maximum thrust. The GEnx-2B67/P engine nitrogen oxides (NOx) emission data in the International Civil Aviation Organization (ICAO) engine emission database was deployed as an example, emission intensity in the flight direction is calculated with the System for Assessing Aviation''s Global Emissions (SAGE). Assuming the aircraft emission is a constant line source at the flight direction, which is perpendicular to the wind direction, a cruise phase pollutant dispersion model is developed based on the Gaussian model. Finally, using the ICAO''s Peebles data in Ohio, USA in 2012, NOx emission and dispersion were simulated for the GEnx-2B67/P engine aircraft for its cruise phase successfully.