对变前掠翼布局隐身特性的数值分析

The Numerical Analysis of Stealth Characteristics for Variable Forward-Swept Wing Configuration

针对变前掠翼布局设计,给出在鸭翼与机头连接处略有不同的2种方案。气动计算表明:在对变前掠翼布局的作战使用中将三角翼用以突防是合理的,且鸭翼与机头融为一体的尖前缘设计方案更优。对2种方案三角翼布局的双站雷达散射特性计算表明:在大部分方位角内其雷达散射截面都处于0 dBm2以下,且波峰波瓣很窄,不易被雷达发现和连续跟踪。相比较而言,尖前缘的设计方案其隐身特性仍然较优。因而在对变前掠翼布局设计时,宜采用将鸭翼前缘与机头前缘融为一体的设计方案。

According to the design of aerodynamic configuration with variable forward - swept - wing, two kinds of variable forward -swept -wing configurations in which there are slight differences on the transition method of nose and canard are given. The aerodynamic results show that the delta -wing is better for breaking through a defense area in a combat, and the second configuration with integrated canard and nose leading edge is more competitive. The study of bistatic RCS of the two kinds of aerodynamic configurations shows that the RCS of the variable forward - swept - wing configuration in most ranges of azimuth is below 0dBm^2, the lobe of wave peak is narrow and not easy to be discovered and tracked continuously. By comparison, the stealth characteristics of the leading figuration are still better. So while optimizing the design of configuration with variable forward - swept edge＇s conwing, it is rational to adopt the design of configuration with integrated canard and nose leading edge.