Research On Safety Intervals Of Runway Crossing At The Back Of Take-off Aircraft

Recently,air traffic is increasing sharply Large-scale hub airports mostly operate on multiple runways,and runway crossing issues are receiving more and more attention.Traditional runway crossing methods not only cannot guarantee safety,but also have low operating efficiency,which exacerbates flight delays and limits airport runway capacity.Therefore,how to carry out runway crossing scientifically and efficiently is particularly critical.Based on this,this paper studies the safety interval of the take-off aircraft's rear-side traversal mode in the back-side traversal mode proposed by the predecessors.In this paper,the safety interval of the rear runway crossing mode of the takeoff aircraft is taken as the research objective,and the influence distance of the engine jet of the takeoff aircraft and the anti-crosswind ability of the rear runway crossing aircraft are studied respectively.In order to study the influence distance of a typical aircraft engine,the high subsonic nozzle is selected to verify the standard model.Firstly,the geometric model of the nozzle is built,then the computational domain is determined,then the unstructured grid is used to divide the nozzle and the computational domain.The first,second order SA and SST Turbulence Models are used respectively,and the numerical simulation of the nozzle is carried out with the aid of CFD hydrodynamics software to verify the accuracy of the calculation method.On this basis,the contraction nozzle model provided by Boeing company is selected,and the cold injection and hot injection methods are used to carry out comparative calculation,and the differences between the two calculation results are analyzed.Finally,the thermal injection method is used to calculate the typical engine jet,and the influence distance of the typical engine jet is studied.Secondly,in order to study the anti-crosswind ability of the rear side crossing aircraft in the taxiing stage,the anti-crosswind ability of the typical aircraft type is obtained by comprehensively considering the geometry size,center of gravity,the position of the front main wheel and the distribution of the engine wake velocity of the take-off aircraft,combined with the lateral force of the aircraft in the engine jet.Finally,the safe interval of the rear side crossing mode of the takeoff aircraft is determined by combining the jet influence distance of the engine of the takeoff aircraft and the anti-crosswind ability of the crossing aircraft,and the proposal of the rear side crossing scheme is given based on the actual operation conditions of Chongqing Jiangbei Airport.The article studies the safety interval of the take-off aircraft's rear side traversal method,and determines the safety interval of the typical aircraft in different combinations.Not only provides technical support for the implementation of the rearside crossing mode,but also improves the operating efficiency of the scene while ensuring the scene operation,which is of great significance to alleviate the pressure on the airport flight.