摘要
为了研究等离子体对超高速模型雷达散射截面的影响,利用气动物理靶测量超高速模型及其绕流的雷达散射截面(RCS),给出了雷达接收信号、信号频谱和模型雷达散射截面的一维距离像。利用时域有限差分方法(FDTD)分析了等离子体鞘套对模型电磁散射特性的影响。将数值模拟结果和试验结果进行了对比,对比结果显示二者符合得很好。数值模拟结果还表明雷达入射角小角度偏移对测量结果有较大影响。
The scattering characteristics of hypervelocity models are measured in the aero-physics range of CARDC（China Aerodynamics Research and Development Center） to research reentry electromagnetic phenomenology.The received radar signal and one-dimensional RCS image of hypervelocity models are obtained.According to these experiments,three-dimensional（3-D） finite-difference time-domain（FDTD） simulations are performed.The numerical results are in reasonable agreement with the experimental results.The simulating results also show the RCS of hypervelocity models will be changed obviously by the deviation of the incident radar wave angle.
出处
《空气动力学学报》
EI
CSCD
北大核心
2010年第6期645-649,共5页
Acta Aerodynamica Sinica
基金
国家自然科学基金(109020120)
