Research On Influences Of Wind To Wake Separation In Terminal Area Of Departure

Wake separation is one of key factors limiting airport capacity.In order to further reduce the wake separation,it is necessary to refine the study of the influences of crosswind done to the wake.The wake attenuation model is improved by inducing of the crosswind influence factor,and the required safety time separation between different types of aircraft is calculated by using of the proved wake attenuation model and the near ground phase wake motion model.The wake characteristics is simulated under crosswind condition by CFD simulation method.A* algorithm is used to analyze the wake encounter risk of the wake block at a certain position on the track.The results indicate that: 1)Under 5m / s crosswind,the safety time separation can be reduced up to 34.0% when the front aircraft is a super heavy aircraft;2)The safety time separation can be reduced by up to 42.2% when an appropriate departure procedure is selected according to the crosswind.Conclusion: 1)The safety time separation can be reduced effectively by considering the influence of crosswind;2)When the crosswind is strong enough to clear the wake out of the safe area,the reduction of safety time separation is more prominent.