Research On Wake Separation Of Aircraft Paired Approach

The demand for air transport in civil aviation has been on the rise due to the swift growth of China’s national economy in recent years.The new operation mode to improve the operation efficiency of the airport has been studied deeply.Paired approach refers to an aircraft approach procedure implemented under instrument meteorological conditions on close parallel runway.The two aircraft paired for approach should not only meet the standard of safe wake interval,but also avoid collision risk.On approach,the two aircraft establish their own localizer,begin the approach at the same time,and then complete the approach landing one in front of the other.Operational efficiency can be significantly augmented and the airport’s capacity augmented through the utilization of the paired approach mode.The paired approach,a method of aircraft approach sequencing and operation based on wake characteristics,is highly influenced by wake factors and hard to manage operational risks,making it difficult to put into practice.Consequently,it is essential to analyze and research the wake effect and safety interval of aircraft during paired approach.This paper will provide some theoretical basis for the formal implementation of paired approach in China in the future.This paper studies the generation and dissipation mechanism of aircraft wake during paired approach,analyzes the range of wake safety zone during paired approach,gives the safety interval standard of aircraft wake under different classification criteria,and analyzes the influencing factors and characteristic attributes of the wake under the joint action of two aircraft.To gain a thorough comprehension of wake’s effect on the paired approach operation mode,the wake vortex dissipation model was constructed by examining the wake vortex dissipation and the wake vortex danger area,as well as the wake evolution of the trailing approach aircraft in the face of crosswind.Based on the influence of crosswind parameter variation on wake evolution of the leading aircraft,the influence of crosswind variation on wake safety area during paired approach procedure is analyzed.A paired approach wake interval optimization model is established.Based on Reich model,collision risk during paired approach is studied.An examination of the fundamental elements that influence the collision hazard in the paired approach procedure is conducted.Models of collision hazard are created in the lateral,longitudinal and vertical directions respectively,and the total collision risk probability resolution algorithm is derived based on these models.An algorithm and model established previously can be employed to evaluate if the safety interval requirements are satisfied by resolving the collision risk during the paired approach.In this paper,the safety interval of paired approach wake and collision risk probability are studied,and the optimization model of wake interval and the calculation method of collision risk probability are proposed.By taking Jiangbei Airport of Chongqing as the scene of practical application simulation,the simulation shows that the model and algorithm proposed in this paper can safely implement the paired approach program.