Research On Aircraft Emission And Diffusion Characteristics Based On Gaussian Puff Model

With the continuous growth of society and economy,air transportation has become more and more important in the global passenger and cargo transportation.The impact of aircraft on the environment has also received more attention from governments and the public.Researching on the characteristics of aircraft emissions and diffusion will help the aviation industry in energy conservation,emission reduction,and environmental protection.For the estimation of gaseous pollutants and the verification of airworthiness,this article uses the standard LTO cycle method,BM2 method,and P3-T3 method,combined with quick access recorder(QAR)data to establish a near-ground LTO emission calculation model.Based on this,a technical path for calculating airworthiness indicators of aviation emissions by estimation methods is proposed,and analysis of airworthiness regulations and technical standards for pollutant emissions is completed.Aiming at the assessment of CO2 emission level and airworthiness verification,a rapid assessment method of aircraft carbon emission level based on QAR data is proposed to establish a correction relationship between fuel consumption rate and flight speed relative to thrust.Compare the range(SAR)value and the aircraft reference geometric factor(RGF)to complete the assessment of carbon dioxide emissions.Based on the completion of the emission estimation,combine with the principle of atmospheric turbulence and the original Gaussian mode under the distribution statistical model,the fixed source continuous diffusion and mobile source continuous diffusion models are analyzed,and the Gaussian Puff model in the relative coordinate system is established by combining the characteristics of aircraft movement.An emission product diffusion model of the aircraft during the near-ground LTO phase was established,and the concentration simulation of the downwind area of pollutant emissions was completed based on the QAR data of a B777-200 aircraft.Based on the QAR data,this paper has completed the research on the emissions and airworthiness of gaseous pollutants and carbon dioxide,and established a near-ground pollutant diffusion model.The related results can be used for aircraft airworthinessverification and environmental protection in the surrounding area of the airport,which provide technical support for the related job.