基于N-S方程的加油机对受油机气动干扰研究

Study on Aerodynamic Interference of Tanker Aircraft on Receiver Aircraft based on N-S Equations

空中加受油时,加油机尾流场会对受油机产生复杂的流动干扰。采用基于Navier-Stokes(N-S)方程的CFD方法分析加油机尾流场,并对加油机、受油机之间的气动干扰进行一体化模拟研究;系统地分析加油机不同迎角及双机不同高度差、不同侧向距离、不同前后位置时,受油机的纵向、横航向气动力特性。结果表明:典型状态下,加油机迎角增大,对受油机的气动干扰增强;高度差越大,对受油机气动干扰越小;侧向距离越大,对受油机气动干扰先增加后减小;前后距离对受油机的影响较小。

The wake flow field of tanker aircraft can produce the complex flow interference on receiver aircraft during aerial refueling.The computational fluid dynamics(CFD)method based on Navier-Stokes(N-S)equations is used to analyze the wake flow field of the tanker,and simulate the aerodynamic interference between tanker aircraft and receiver aircraft.The longitudinal and lateral-direct aerodynamic characteristics of the receiver aircraft are systematically analyzed under certain conditions,such as different tanker’s angles of attack,different height differences between two aircrafts,different lateral distances and different front and rear positions.The results show that,under typical conditions,the aerodynamic interference to the receiver is increased with the increase of the tanker’s angle of attack.The higher of the height difference between the receiver and the tanker is,the smaller of the aerodynamic interference to the receiver is.With the increase of the lateral distance,the aerodynamic interference to the receiver is increased firstly,and then decreased.The influence of fore-and-aft distance on the receiver is small.