侧风滑跑条件下的地面涡气动特性研究

以缩比的近地面短舱进气道为研究对象，通过数值计算的方法得出侧风来流条件下地面涡的流场特征和气动特性，着重研究飞机滑跑对地面涡的影响。研究表明：在无相对滑跑时，速度比和离地间隙是影响地面涡特性的重要因素。来流速度越大，离地高度越高，地面涡的强度就越高；进气畸变主要受来流速度影响，流速越高，畸变程度越严重。有相对滑跑时，重点考虑来流速度和滑跑速度对地面涡的影响。来流速度对进气畸变影响很大，畸变指数随着风速升高而增大；滑跑速度是地面涡强度的主要影响因素，滑跑速度越高，地面涡强度越弱。

Research on the Aerodynamic Characteristic of Ground Vortex Under Crosswind with Taxing Conditions

A scaled nacelle intake near ground was investigated, based on the numerical calculation method, the physical and aerodynamic characteristics of the ground vortex under the crosswind conditions was obtained, the influence on vortex of aircraft taxing was researched emphatically. The results show that velocity ratio and ground clearance are the key factors affecting the characteristics of ground vortex. As the wind velocity increases and the ground clearance becomes smaller, the ground vortex circulation becomes stronger. The intake distortion is mainly dependent on the wind velocity, the higher the velocity, the more serious the distortion. When aircraft taxing was concerned, the wind velocity and taxing speed were mainly considered. The approaching velocity has a significant influence on the inlet distortion, and the distortion coefficient increases with the increase of wind speed. The taxing speed is the determinants affecting the vortex strength. The higher the speed is, the weaker the intensity of ground vortex is.