Aircraft Emission Estimation And Dispersion Modeling Based On Flight Data

With the rapid development of China’s aviation industry,the impact of aviation emissions on the atmospheric environment has been increasingly serious.As the most intensive area of aviation activity,airports have a significant impact to the local air quality,which is influenced by the relevant pollutant emissions at the airports.Thus,assessing,monitoring and controlling the local air quality at the airport can help the ecological environment near the airport remain stable,and ensure the health of airport workers and nearby residents as well.Airport emissions inventories and pollutant diffusion concentrations are the two ways to assess the local air quality at the airport.Using the actual flight data(QAR data)to estimate the main engine emissions of the aircraft in the airport area can improve the accuracy of the airport emissions inventory.The paper firstly uses the first-order approximation 3.0(FOA3.0)method to supplement the ICAO engine emission database particulate matter emission index,and studies the estimation method of engine pollutant emissions(hydrocarbons,carbon monoxide,nitrogen oxides and particulate matter)based on QAR data.Then,based on the daily operation data of Beijing Capital Airport and the 1326 QAR data of domestic flights on that day,the studies estimate the pollutant emission indexes of the engine in actual flying conditions by using Boeing Fuel Flow Method 2(BFFM2),formulate the emissions inventory of main aircraft engines at the Capital Airport,and in the meantime,distribute the emissions inventory by time and space.After comparing the QAR data-based emission inventory and the emission estimation results based on the ICAO Standard Landing and Take-Off(LTO)cycle method,paper analyzes the causes of the deviations of the two methods,and provides new ideas of the calculation of the main engine emissions by combining the LTO cycle and the actual data localization.The characteristics of the flight emissions of the Capital Airport are also analyzed by using the calculation results of a large number of flight emissions.Finally,based on the Gaussian plume model,the multi-source diffusion mode of airport aircraft pollutants is established.Based on the actual data,the concentration distribution of the capital airport’s aircraft along the runway is simulated,and the runway capacity based on environmental standards is also discussed.