Environmental crosswind can greatly affect the development of aircraft wake vortex pair. Previous numerical simulations and experiments have shown that the nonlinear vertical shear of the crosswind velocity can affect the dissipation rate of the aircraft wake vortex, causing each vortex of the vortex pair descent with different velocity magnitude, which will lead to the asymmetrical settlement and tilt of the wake vortex pair. Through numerical simulations, this article finds that uniform crosswind convection and linear vertical shear crosswind convection can also have an effect on the strength of the vortex. This effect is inversely proportional to the cube of the vortex spacing, so it is more intense on small separation vortex pair. In addition, the superposition of crosswind and vortex-induced velocities will lead to the asymmetrical pressure distribution around the vortex pair, which will also cause the tilt of the vortex pair. Furthermore, a new analysis method for wake vortex is proposed, which can be used to predict the vortex trajectory.

环境侧风会极大地影响飞机尾流涡流对的发展。先前的数值模拟和实验表明，侧风速度的非线性垂直切变会影响飞机尾流涡流的耗散率，导致涡流对中的每个涡流以不同的速度幅度下降，这将导致不对称的沉降和倾斜。尾涡对。通过数值模拟，本文发现均匀的侧风对流和线性垂直剪力侧风对流也会对涡流强度产生影响。此效果与涡旋间隔的立方成反比，因此在较小的分离涡流对上效果更明显。此外，侧风和涡流引起的速度的叠加将导致涡流对周围的压力分布不对称，这也将导致涡流对的倾斜。此外，提出了一种新的尾流涡旋分析方法，可用于预测涡旋轨迹。