Aircraft Wake Vortex Scenarios Simulation Package for Takeoff and Departure

摘要

WakeScene-D, a software package to determine wake vortex encounter probabilities for departures is described. The components of WakeScene-D that model traffic mix, aircraft trajectories, meteorological conditions, wake vortex evolution, and potential hazard area are specified together with the validation work accomplished thus far. Further, a brief estimation of related uncertainties is provided. WakeScene-D is an extension of WakeScene [10] that has been developed for approach and landing. Compared with this precursor version, major improvements have been achieved regarding realistic aircraft trajectory modeling on different standard departure routes. The developed trajectory model fully considers the impact of the most relevant parameters for 6 heavy vortex generator and 4 medium follower aircraft types. The comparison of simulated departures with full-flight simulator data and with 20,000 measured departures at Frankfurt airport yields good agreement. Another step ahead has been achieved by modeling the wake vortex behavior within inclined and moving gates. The gates that are oriented perpendicularly to the aircraft heading and flight-path angles are released in predefined time steps along the flight path and are adverted through space by the prevailing headwind's respective tailwinds. The real target of WakeScene-D, the determination of appropriate crosswind thresholds allowing for reduced aircraft separations, is the subject of ongoing work and will be documented in a future publication. The first application examples of the software package can be found in [9].