高超声速目标湍流Dynamo模型及磁特性提取

高超声速武器装备具备突防概率高、杀伤力强等显著特点，对此类目标的有效探测和拦截紧密关乎人民安全和国家所处的世界战略位置。然而，相较于传统飞行器，高超声速飞行器具有飞行速度快、机动性强以及其周围存在等离子体鞘套等特点，现有目标探测手段在对此类目标的远程探测和连续跟踪问题上面临极大挑战。对高超声速目标特性的充分认知是解决此技术瓶颈的重要基础。本项目拟从高超声速飞行器周围等离子体鞘套的物理特性出发，研究其湍流Dynamo过程产生的磁场特性，试图从此角度挖掘其新的目标特性。通过建立鞘套Dynamo过程的理论模型，计算得到所产生磁场的增长率及谱分布；研究Dynamo过程产生的临界条件，分析和提取高超目标磁场特征；基于现有磁探测能力研究其可探测性，并形成相应的探测概率评估方法。本课题的研究结果有助于增进对于鞘套内部物理机制的认知，并且在现有高超声速目标电磁散射和红外辐射等特性之外，发掘其新特征，为高超声速目标探测提供新思路。

Hypersonic weapons have the characteristics of high penetration probability and strong attack ability. The effective detection and interception of hypersonic targets is closely related to the national safety and the global strategic position of China. However, compared with traditional aircraft, due to the high speed, strong maneuverability, and the surrounding plasma sheaths, current target detection methods have great difficulties in remotely detecting such targets and continuously tracking. To break through this bottleneck, enough knowledge of the target characteristics is fundamental. This project intends to study the characteristics of the magnetic field generated by the turbulent dynamo process in plasma sheaths, and try to explore a new target characteristic. This project plans to establish a theoretical model of dynamo process in the plasma sheath, based on its physical properties, calculate the growth rate and the spectral of the generated magnetic field, explore the critical conditions for this phenomenon, analyze and extract the magnetic field characteristics. Also, based on the capabilities of the existing magnetic detection technology, this project aims to evaluate the detection probability and form the corresponding evaluation method. The research results of this project will contribute to improving the knowledge of internal physical mechanism of the plasma sheath, and exploring a new hypersonic target characteristic besides current characteristics of electromagnetic scattering and infrared radiation, which helps to provide a new idea for hypersonic target detection.