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| A coupling model and its application on impact assessment of the aircraft emissions during LTO cycle |
| HAN Bo1, KONG Wei-kai1, TAN Hong-zhi2, WANG Li-jie1, HE Zhen1, ZHONG Yi-qian3, WEI Zhi-qiang1 |
1. Tianjin Key Laboratory for Air Traffic Operation Planning and Safety Technology, College of Air Traffic Management, Civil Aviation University of China, Tianjin 300300, China;
2. Operation Control Center, Shandong Airlines Corporation, Jinan 250014, China;
3. Aeronautical Information Service Center, Air Traffic Management Bureau, Civil Aviation Administration of China, Beijing 100122, China |
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Abstract The pollutants emission rate and spatial location of engines are dynamic during the LTO cycle of civil aircraft. To quantify and analyze the impact accurately, the paper constructed an aircraft LTO emission impact assessment coupling model. The paper was carried out by simulating the LTO flight path of aircrafts, using aerodynamics model, to get performance parameters (real-time fuel flow) of each position within the path. It defined pollutants emission rates of each position, by applying the emission calculating model. Then, it calibrated the Lagrangian puff model for the emission characteristics of the airplane puff, and simulated pollutants dispersion. It collected airborne data of a typical aircraft during its whole LTO cycle, and carried out a real case study, referring to real-time meteorological parameters. The result showed that the average emission rate of NOx, SO2, CO, PM and HC were 17.71, 2.21, 1.05, 0.20 and 0.03g/s respectively during the LTO cycle. When the aircraft took-off, the scope of puff dispersion amassed on the runway and were within 300meters laterally and 3000meters longitudinally of it, and the maximum ground-level concentration of NOx surpassed 100mg/m3. When the aircraft climbed up to the top of mixing layer, finishing the take-off, the pollutants expanded laterally to 1200m, and the ground-level concentration of NOx, keeping severe, declined to 298.5μg/m3. while the concentrations of other pollutants were relatively lower.
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Received: 10 November 2019
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