Evaluation Of Pollutants Emission Reduction Effects Of Aircraft In Approach

Recently,the global aviation industry has developed rapidly and the air traffic volume has increased dramatically.The air pollution problem caused by the aviation exhaust gas is becoming more and more serious,so the environmental air quality around the airport needs to be effectively controlled.Scientific and rational assessment is used to understand and evaluate the status of aircraft emissions,and then we can take effective measures to control the aircraft pollutants emissions.Based on this,we study the inbound flights in Guangzhou Baiyun Airport through BADA model for the flight test simulation.Considering the change of outside meteorological conditions,we also evaluate pollutant emission reduction effect of different flight procedures under different meteorological conditions.We also develop aircraft emission reduction evaluation system under different flight conditions,which gives comprehensive analysis of emission reduction effect of various approach direction in Baiyun Airport.In terms of using meteorological factors to achieve aircraft emission reduction,we summarize the meteorological factors influencing aircraft pollutant emissions.According to three kinds of meteorological factors,including air temperature,air pressure and wind speed,we propose the modified calculation method of pollutant emissions.Based on BADA model and the aircraft trajectory prediction model,we establish pollutant emission calculation model with aircraft performance and environmental data.We perform integral calculation,interpolation calculation and correction calculation with MATLAB programming and draw the curve,which shows the relationship of aircraft emissions,to realize the dynamic visualization of aircraft emissions.The results show that,the best meteorological conditions can reduce about 3.38% pollutant emissions by a single approach flight.It is suggested that the best meteorological conditions should be used for aircraft taking-off and landing to reduce the emissions of aviation pollutants.In terms of implementing flight procedures to achieve aircraft,we systematicly study the summary,the concept,the status quo and the trend of CDA.Using the example of GYA arrival point of Guangzhou-Baiyun airport and B767-300 aircraft,we carry out the study on the pollutants emission of traditional step approach and CDA,we also calculate the total emission of various pollutants and estimate the different height distribution of pollutants emission,and then the quantitative evaluation on emission reduction effect of CDA is completed.The results showed that,compared with the step approach,CDA can save over a quarter of the fuel consumption per flight and it can effectively reduce four kinds of pollutants emission,such as HC,CO,NOX and SO2,and NOX emission reduction effect is the best.Promoting CDA helps to realize energy saving and emission reduction of China's civil aviation industry.Based on the existing algorithm and model,we construct the aircraft emission reduction assessment system by using MATLAB programming.According to the flight data of arrival aircraft in the target airport,this aircraft emission reduction assessment system can calculate and output the aircraft flight altitude,flight speed,thrust,three-dimensional profile,and the fuel flow rate,fuel consumption,pollutant emissions and pollutant emissions at different height distribution.The emission reduction of different flight procedures under different meteorological factors is evaluated for all arrival aircrafts in Guangzhou Baiyun Airport,which can provide a digitalized and visual reference basis for aircraft emission reduction assessment.