Research On Wake Turbulence Separation Applied On Closely Spaced Parallel Runways Under Crosswind Conditions

Closely spaced parallel runways has been widely adopted due to its small footprint and less basic investment in the process of airport construction.Wake turbulence separation is an important factor limiting the airport runway capacity.At present,China's closely spaced parallel runways use relatively conservative wake turbulence separation,which restricts its capacity increase.Based on this,this dissertation studies the wake turbulence separation of closely spaced parallel runways.This paper firstly introduces the operation modes and applicable intervals of closely spaced parallel runways,and analyzes the separation standards for landing and take-off,and then determines the key research content for optimizing the wake turbulence separation for takeoff using crosswinds.Then,based on the domestic and overseas advance,the wake vortex decay model,the wake vortex transport model and the aircraft wake vortex encounter model are determined in this paper.Through the above three models,this paper establishes a model of wake turbulence separation for takeoff for closely spaced parallel runways,and realizes the assumption of optimizing the wake interval with crosswind.The model considers factors such as wind speed error and aircraft position error to improve the safety and practicality of the wake separation.In addition,in order to specifically quantify the encounter risk of crossing wake separation after crosswind optimization,a wake encounter risk assessment model was established in this paper.Finally,taking Shanghai Hongqiao International Airport as an example,this paper uses B747-400 as the lead aircraft and B737-700 as the trailing aircraft.It uses crosswind conditions to optimize the wake turbulence separation for takeoff.The calculation results are compared with the value of Eurocontrol wake encounter risk,verifying that its safety performance fully meets actual operating requirements.This paper establishes the model of wake turbulence separation for takeoff,uses crosswind conditions to optimize the takeoff wake interval of CSPRs,and presents the verification standard for whether the wake interval can be implemented.The research results are of great significance for reducing the interval between takeoffs of close parallelrunways in China and increasing the runway capacity.