Research On The Risk Of The Closely Spaced Parallel Runway Paired Approach Based On Wake Characteristics

With the continuous growth of air transport demand,the pressure of civil aviation transport is increasing.On the premise of not increasing facilities and equipment,some new transport modes to improve the operation efficiency and use facilities better have been proposed by researchers.The close parallel runway paired approach operation can effectively improve the airport capacity and increase the number of aircraft taking off and landing at the airport.However,due to the relatively small longitudinal separation between the two aircrafts in the operation process,and the complex program,it is more susceptible to the influence of wake factors for the aircraft,and is more difficult to assess the operation risk,so the paired approach operation is still difficult to put into actual operation.Therefore,it is necessary to evaluate the influence of wake on the risk of running on the closely spaced parallel runway to provide a basis for future implementation.In order to fully understand the influence of wake vortexes on the closely spaced parallel runway paired approach operation,It is planned to use the large eddy simulation method in the numerical simulation to simulate the basic characteristics of the close distance of the wake.According to the propagation characteristics of the wake vortex,the propagation trajectory of the wake vortex and the danger zone formed by the backward propagation of the wake vortex are obtained by the mathematical regression method,and verified wake danger area by the example;Furthermore,the initial values of relevant parameters in the aircraft approach process were obtained from the aircraft ADS-B data through mathematical statistical methods,which were taken as the initial parameters of the aircraft’s close parallel runway paired approach operation.At the same time,the longitudinal,vertical and lateral collision risk statistics of the two aircrafts were obtained based on the statistical data.According to wake propagation characteristics and probability distribution of risk statistics,establishing the corresponding paired approach kinematics model and designing collision risk solving algorithm to solve the collision risk during the paired approach process,and then the impact of related parameters on the collision risk were analyzed.Through the study in this paper,the local and global distribution characteristics and propagation characteristics of wake flow after its generation were obtained,and the basic propagation mechanism of wake vortex was obtained.Through the study on the danger zone of wake vortex,the separation limit of the paired approach aircraft was obtained,and the separation range required by the two aircraft for the paired approach operation was obtained.According to the calculated results of the paired approach collision risk,the change of the collision risk with time during the paired approach was obtained.By analyzing the influence of parameters on the risk,the risk sensitivity factors of the paired approach collision are obtained.Through the research in this paper,we can further understand the wake vortex and provide references for taking measures to avoid it.In addition,it can provide theoretical guidance for the two aircrafts to maintain the target safety level and make a paired approach at a close parallel runway.Under the condition that the two aircrafts meet the wake limitation,the initial separation,positioning accuracy,speed accuracy,glide angle and offset angle are kept within the appropriate range,and the paired approach of the two aircrafts can achieve safe and efficient operation.