基于CFD的起飞点后侧穿越跑道安全间隔研究

CFD⁃based study on the safety interval of the rear side crossing runway

为提升机场场面运行效率,基于起飞点后侧穿越跑道方式,采用CFD数值模拟方法对起飞点后侧穿越跑道的安全间隔进行探究。以B737-800为例,对在一定距离下前机发动机作用于后机的场景进行数值模拟,结合空重情况下后机抗侧偏力分析,认为487m间隔下沿喷流方向上后机所受合力大于其抗侧偏力。在487m间隔的基础上增加距离进行计算,认为应取600m为新的安全间隔。

In order to improve the operation efficiency of the airport scene,based on the way of crossing the runway at the rear of the takeoff point,the CFD numerical simulation method was used to explore the safety interval of crossing the runway at the rear of the takeoff point.Taking B737‑800 as an example,the numerical simulation was carried out for the scene of the front engine acting on the rear engine at a certain distance.Combined with the analysis of the side bias force against the rear engine in the case of empty weight,it was concluded that the resultant force on the rear engine along the jet direction at an interval of 487 meters was greater than its side bias force.On the basis of 487 meters,the distance is increased and 600 meters is considered as the new safe distance.