为了研究加装雷达反射器对火箭靶弹气动特性的影响,利用计算流体力学软件对加装不同尺寸角反射器的靶弹与加装龙伯透镜反射器的靶弹进行数值仿真计算,分析了二者的气动特性并与原型弹进行了对比分析。仿真结果表明:加装角反射器靶弹的零升阻力系数增大3%,升力系数减小5%,静力矩系数最大增加7.5%;角反射器靶弹的零升阻力系数及静力矩系数随角反射器尺寸的增大而增大,升力系数随角反射器尺寸的增大而减小;加装龙伯透镜反射器靶弹的零升阻力系数增大80%,升力系数减少8%,静力矩系数最大增加5%;改造后的靶弹静稳定储备量均能保证飞行稳定。最后通过飞行试验验证了数值算法的可靠性及靶弹改造方案的可行性。

To study the influence of the installation of radar reflector on the aerodynamic characteristics of rocket target, the numerical simulation of the target with different size angle reflector and the target with robber lens reflector is carried out by using computational fluid dynamics software. The aerodynamic characteristics of the two are analyzed and compared with the prototype. The simulation results show that the zero-lift drag coefficient of the target with angular reflector increases by 3%, the lift coefficient decreases by 5%, and the static moment coefficient at most increases by 7.5%. The zero-lift drag coefficient and static moment coefficient of the target with angular reflector increase with the increase of the size of the angular reflector, and the lift coefficient decreases with the increase of the size of the angular reflector. The zero lift-drag coefficient of the target with Luneburg lens reflector increases by 80%, the lift coefficient decreases by 8%, and the static moment coefficient increases by 5% at most. The static stability reserve of the transformed target can ensure flight stability. Finally, the reliability of the numerical algorithm and the feasibility of the target transformation scheme are verified by flight test.