| The third runway of Chongqing Jiangbei airport was officially put into use,which means that the jiangbei airport moves into the three runway era.It also means on the basis of the original layout of the airport including runways,taxiways and gate positions,the increased terminals,aprons and third runways are bound to make aircraft taxi become more complicated.This puts more pressure on airports and on the safety of aircraft ground running.According to the layout of Chongqing Jiangbei airport,this paper analyzed the possible risks of aircraft taxi under different operating mode,and put emphasis on exploring the possible influence of the side wind on the operation of ground taxiing aircrafts.This part of research provided reliable theoretical support for the complex prioritization scheme of ground taxi and was significant for the safety of aircraft operation.This paper carried out a specific and detailed exploration of this part,including the following points:Firstly,this paper introduced some basic knowledge of computational fluid mechanics,determined the calculation region of model outflow field and made classification description analysis on mesh dividing technology of CFD numerical simulation technology.It focused on analyzing the difference between several mesh dividing softwares,and explained the advantages and disadvantages of them.Catia was used to carry out 3D model for the simulation model and determine the computing area and the division of grid.Then,we selected the appropriate calculation model and turbulent model,used Fluent fluid calculation software,and adopted the finite volume method to carry out the numerical simulation for the aerodynamic distribution of aircraft under the crosswind environment.We conducted the secondary development using UDF interface programming technical secondary development,set up the crosswind inlet condition,and carried out analogue simulation to ground aircraft model for physical time of 90 s.We also made statistical analysis on the aircraft aerodynamic force influenced by crosswind under different states,and through Matlab found out the functional relationship between aerodynamic force affecting on the aircraft and time.According to the crosswind speed conditions defined by UDF,we can draw a conclusion throw calculating.When the crosswind speed reaches 22.5 m/s,aircraft taxi will become unstable.Meanwhile,the aircraft will be offset in the process of sliding,and the increase of crosswind velocity will bring some dangers.Finally,we statistical analyzed the wind power and wind direction of Chongqing Jiangbei airport in recent years.According to the production principle of drawing wind rose diagram,the wind rose and wind speed frequency diagram of Jiangbei airport were seasonal and yearly mapped.From such an analysis,Jiangbei airport annual average wind speed is low,and northerly winds is the prevailing wind direction.We compared the results of statistical analysis with the maximum crosswind value under the safety taxiing state of aircrafts.The comparison showed that it is less likely that the aircraft will be influenced by natural crosswind in the taxi progress at Jiangbei airport.Then,according to the scene layout and various operating mode of Chongqing Jiangbei airport,the safe distance influenced by the take-off aircraft engine jets was studied under the circmstances of take-off aircraft back acrossing the runway.This paper put forward reasonable security solution on back through providing references for actual operation. |
PDF Full Text Request