升力体构型高超声速飞行器气动特性分析

Analysis of aerodynamic characteristics of a liftbody aircraft

高超声速飞行器所采用的超燃冲压发动机工作时,进气道和尾喷口的流场扰动将造成气动参数变化,控制系统应在这个变化条件下保证飞行器的姿态精度。为了考虑发动机工作流场的影响,有针对性地设计控制系统,研究分析了在发动机不同工作状态下升力体构型高超声速飞行器气动特性的变化,以及操纵舵面偏转对其气动特性的影响。着眼于保证飞行器飞行姿态的控制系统设计,对超燃冲压发动机不同工作状态下的高超声速飞行器的气动特性给出了解析描述,为控制算法的设计提供了重要参考。

When the scramjet engine works,the disturbed flow field around the inlet and tail nozzle will make aerodynamic parameters changed.In this situation,the control system should ensure the vehicle＇s flight attitude.The paper studies the impact of different work situation and the diverse angle of control surface on aerodynamic parameters of hypersonic waverider vehicle.Accordingly,the analysis results of aerodynamic parameters of hypersonic vehicle are obtained under different work situation,providing important reference for the design of control arithmetic.