Research On The Atmospheric Evironment Impact Assessment From Aircraft Engine Emissions In Airport

Quantify atmospheric impact from aircraft engine emission in airport and the effects'scale and depth, it is important to demonstrate the construction project and implement the sustainable development of airport. To attain the need of environment research, it aimed the assessment of the atmospheric effects of aircraft engine emissions, analyzed the generation mechanisms and influencing factors of the aircraft engine emission, introduced the technology of FTIR remote passive sensing to analyze the exhausts component, accomplished the monitoring and dynamic assessment of the aircraft engine emission. Four key issues are studied in this thesis as follows:(1) Set up the framework system of atmospheric effects assessment in airport. All the potential emission sources in airport except the aircraft are modeled, including auxiliary power units, ground support equipment, ground access vehicles and stationary sources. The Gaussian formulation based on point source form is put forward. It is pointed that the study emphases are the building of aircraft emission inventories and dispersion concentration prediction in the airport.(2) Build the inventories from aircraft engine emissions in the airport of Civil Aviation. The thesis analyzed the influencing factors of emissions in airport from aircraft engines. Based on the ICAO's (International Civil Aviation Organization) standard landing and take-off(LTO)cycle and its'Engine emission data bank, the improved emission inventory model method is put forword. Using the fleet data and the flight data of civil aviation, the emission data bank of China commercial aircraft is build, the functional relationships between emissions and numbers of LTO cycle are modeled. Total LTO emission from aircrafts at airports of civil aviation is estimated in 2002 to 2006. The estimations show that a decrease in taxiing time results in a decrease of emission in LTO emissions. This discussion is the groundwork of control emissions by improving the aircraft process.(3) Study the pollutant concentration prediction methods from Aircraft engine emission in the Airport of Civil Aviation. Based on the ICAO's standard LTO cycle, the aircraft's paths in the airport are simplified ideally. According to the methods of inventory, the emissions of approach, taxi, take-off and climb of each hour from Aircraft aero-engine in the Airport are calculated. Based on the Gaussian point source formulation, the Gaussian line-source dispersion model is applied to the prediction. By modifying some parameters of the model, the component predition model is builded from aircraft emission in the airport. The results of each hour pollutant concentration and the pollutant concentration profiles are got over a range of airport meteorology data. (4) To attain the need of the exact calculation of emission and aircraft monitoring in the flight, the remote FTIR passive sensing is applied to monitor aero-engine exhausts and determinate the concentration of the exhausts gases of aero-engines. The emission spectrums of aircraft engine exhausts are got by using TENSOR27 FTIR-system in a test rig. By the contrast analyzing between the traditional FTIR-emission-spectroscopy methods and the three layers atmosphere model methods,the results of concentration of the emission components under different thrusts and Emission Index of pollutant are got. It provides a way for exact calculation of emission inventory.By the research, the framework system of atmospheric effects assessment in airport is set up, the emission data bank of China commercial aircraft is build, the improved emission inventory model method is put forword, the dispersion concentration is predicted from Aircraft engine emission, the technology of FTIR remote passive sensing is used. The theoretic and dynamic emission assessment are accomplished from aircraft engine in airport.