英语语法分析

Dust effects when driving over certain surfaces, rotor downwash effects for helicopters and VTOL aircraft.

粉尘影响驾车时的某些表面，转子影响直升机和垂直起降飞机。

The forming, the distribution and the influence of the downwash flow on helicopter main rotor are discussed.

探讨了直升机旋翼下洗流的形成、分布和影响。

First, free wake analysis was carried out to calculate the rotor wake geometry and the downwash around the engine jet space.

首先应用自由尾流分析技术来计算旋翼尾迹和发动机绕排流空间的洗流速度。