高超声速气流与高能激光联合作用下金属靶体毁伤机理和多场耦合效应研究

高能激光武器被认为是未来战场拦截高超声速导弹的最有效手段之一。然而，高超声速靶体的目标特性显著区别于传统的靶目标，高能激光与之相互作用时将引发复杂的多场耦合效应，由此诱导的破坏机制尚不清楚。我们初步的实验结果发现，高超声速气流对高温合金靶体的激光毁伤产生了不容忽视的影响，起到了明显的加速作用。为揭示其中的多场耦合破坏机理，本项目拟开展高超声速来流条件下损伤凹腔流动特性、高超声速气流环境中激光辐照金属靶体多场耦合毁伤效应、高超声速气流与高能激光束流联合破坏效应实验方法等研究，以期在激光诱导损伤形貌对高超声速气流的作用机制与影响规律、高超来流和高能激光共同作用下金属靶体流-热-固多场耦合破坏机理等关键科学问题上实现突破。本项目研究成果为反制高超声速飞行器的激光武器工程化应用提供必要的理论储备与技术支持。

High energy laser weapon is regarded as one of the most effective means to intercept the hypersonic missile in future battlefield. However, it should be noted that the characteristics of hypersonic target are significantly different from that of the conventional target. When the high energy laser interacts with the hypersonic target, the complex multi-physics coupling effects will be triggered and the induced failure mechanisms have not been clarified. We conducted a preliminary experiment, and the results showed that the hypersonic flow produced unneglected influence on the laser damage of the high temperature alloy target and greatly accelerated the damage process. In order to reveal the failure mechanism, the project focuses on three main issues, namely, the hypersonic flow characteristics over the cavity damage caused by the high energy laser, the multi-physics coupling damage effects when the laser irradiates the metal target in the hypersonic flow, the damage experiment method under the joint effects of the hypersonic flow and high energy laser beam, etc, which aims at making breakthroughs on the following two key scientific issues, namely, the influence rule of the laser irradiation induced damage morphology on the hypersonic flow, the fluid-thermal-solid multi-physics coupling failure mechanism of the metal target under the combined action of the hypersonic flow and high energy laser. The achievements of this project can provide theoretical and technical support for the engineering application of the high energy laser weapons applied in the hypersonic target interception.