侧向风速对飞机尾流运动的影响

Influence of Crosswind Speeds on Aircraft Wake Vortex Movement

为了使机场雷达能实时探测和定位飞机尾流,对飞机飞行环境进行合理假设后提出了一个仿真尾流的保守被动模型,该模型能很好地描述尾流中水蒸气等物质的运动演化规律。综合考虑大气环境中风速对尾流的影响,利用该仿真模型对尾流进行了实时仿真,得到了不同侧向风速情况下,不同时刻尾流的状态分布等重要特性。通过分析侧向风速对飞机尾流运动过程的影响,证明了当侧向风速为1.0～3.0m/s时是最危险的,所得结论可为飞机飞行过程中避免尾流的影响提供理论依据。

In order to enable the airdrome radar to detect and locate aircraft wake vortices in real time, a passive conservative model is proposed to simulate the wake vortices with reasonable assumptions about the flying environment. This model can depict fairly well the movement evolution of water vapor and other matter in wake vortices. This model takes into consideration the influence of erosswind speeds in the atmosphere on wake vortices, and is used to simulate the wake vortices in real time and find their distribution characteristics at different crosswind speeds and times. Analysis of the impact of crosswind speeds on aircraft wake vortices indicates that the most dangerous crosswind speed is between 1.0-3.0 m/s. This conclusion can be of theoretical value in the study of the impact of vortices on aircraft flying.