Calculation method for required wake turbulence separation integrating UAVs into civil aviation airspace
To mitigate the risks of dangerous encounters caused by wake turbulence during airspace integration,this research developed a model to calculate the required wake turbulence separations between large fixed-wing UAVs and commercial aircraft.First,the study utilized MATLAB software to establish models for the wake evolution of the leading civil aircraft(the leading aircraft)and the encounter response of the following large fixed-wing UAV(the following UAV).Next,based on the D2P model,the research constructed an assessment model for the dangerous area of wake turbulence affecting the following UAV,incorporating the induced rolling moment coefficient and the aerodynamic diffusion mechanism.This model comprehensively accounts for the positional errors of both the leading aircraft and the following UAV.By calculating the induced rolling moment coefficient within the wake turbulence region,the research quantified the risk level of the UAV encountering wake vortices and identified a safe positional range for the UAV.Finally,based on existing wake turbulence separation standards in China,the study determined adjusted wake separations for various typical commercial aircraft and UAVs.Through a comparative analysis of the wake characteristics among various aircraft types,the research adjusted the wake turbulence separations between different typical commercial aircraft and UAVs to meet the requirements for effective airspace integration.The results indicate that under calm wind conditions,when a leading aircraft(A380)flies at 66.5 m/s and a following UAV(MQ-1 Predator)operates at 50 m/s,the total tolerances are as follows:lateral separation of 110 meters,longitudinal separation of 1 km,and vertical separation of 20 m.To ensure flight safety,the UAV must maintain a minimum longitudinal separation of 17 km,a lateral separation of 133.5 m,and a vertical separation of 339 m from the leading aircraft.Depending on the type of leading aircraft,adjustments to the longitudinal,lateral,and vertical wake turbulence separations range 14-17 km,88-133.5 m,and 108-322 m,respectively.This approach allows for accurate predictions of safe positions for UAVs within the wake fields of commercial aircraft,thereby facilitating the adjustment of wake separations and enhancing airspace utilization.
万方数据
维普
