PM Emission Characteristics And Diffusion Model Optimization Of Aircraft Full Flight Phase

With the rapid development of the aviation industry at home and abroad,the impact of aviation emissions on the atmospheric environment is becoming more and more serious: it will not only affect the air quality around the airport,but also make a certain contribution to global climate change.Therefore,it is particularly important to evaluate the pollutant emission characteristics of the entire flight segment of the aircraft and measure the temporal and spatial distribution of the diffusion concentration.For particle pollutant emission assessment and energy saving and emission reduction:Combining emission database and airborne QAR data,based on the first-order approximation method,a modified model such as the formation oxidation method is used to analyze the entire flight segment of a single aircraft(including take-off and landing cycles and The emission characteristics of the cruise phase)are evaluated.On this basis,the impact of aircraft operating parameters on emission characteristics is analyzed,and by optimizing operating parameters,pollutant emissions are reduced to varying degrees and the environmental protection of aircraft operations is improved.In terms of research on inspection methods equivalent to aircraft emission airworthiness compliance: first interpret the airworthiness regulations of aviation emissions(CCAR-34)and its limit standards,and then combine the parameters such as thrust settings in flight data to calculate and The results of the same dimension of the restriction standards are compared,in order to establish an equivalent inspection method for airworthiness compliance of pollutant(particulate and gaseous)emissions based on QAR data.Based on the emission characteristics,establish a pollutant diffusion model around the airport: modify the Gaussian Puff model based on the aircraft trajectory,real-time emission source intensity,and smoke lift height,and calculate the near-ground(taxi,take-off,climb,and approach phases))Diffusion concentration distribution of particulate matter around the airport at different times.Analyze the factors affecting the diffusion concentration,and take Shanghai Pudong International Airport as an example to propose the layout of pollutant monitoring points.In this study,combined with actual flight data,an evaluation model of particulate pollutants emitted by aircraft,an equivalent inspection method for airworthiness compliance,and a pollutant diffusion model near the ground were established.Relevant research can provide new ideas for the theory and engineering application of airport air quality assessment and airworthiness compliance inspection.