| 舰船湍流尾迹的数值模拟及其单站RCS计算 |
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| 引用本文： | 任维君,丁娟娟,刘鹏. 舰船湍流尾迹的数值模拟及其单站RCS计算[J]. 电波科学学报, 2016, 31(3): 568-572. DOI: 10.13443/j.cjors.2015081201 |
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| 作者姓名： | 任维君 丁娟娟 刘鹏 |
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| 作者单位： | 复旦大学电磁波信息科学教育部重点实验室, 上海 200433 |
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| 基金项目： | 国家自然科学基金(61471127) |
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| 摘 要： | 基于舰船湍流尾迹的半经验公式和双线性叠加方法, 分别模拟船尾射流尾迹和船侧涡流对尾迹, 与湍流实验结论比较, 验证了模拟结果的准确性以及方法的有效性.提出一种用双尺度模型结合物理光学法(Physical Optics, PO)计算粗糙面电磁散射的方法, 应用该方法计算风驱海面杂波雷达散射截面(Radar Cross-Section, RCS)并与双尺度方法(Two Scale Method, TSM)的计算结果和实测数据比较, 吻合得较好, 验证了该方法的正确性.应用该方法计算湍流尾迹的雷达散射截面, 为数值模拟舰船尾迹的合成孔径雷达图像奠定了基础.
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| 关 键 词： | 舰船湍流尾迹 双线性叠加法 雷达散射截面(RCS) 物理光学法(PO) 双尺度方法(TSM) |
| 收稿时间： | 2015-08-12 |
Simulation and monostatic RCS calculation of ship turbulent wake |
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| Affiliation: | Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai 200433, China |
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| Abstract: | Based on bi-linear superposition method and semi-empirical energy spectrum expression, the turbulent wake behind the ship, which consists of a vortex pair and jet flows, is numerically simulated. A hybrid physical optics(PO) and two scale method (TSM) is presented to calculate the backscatter from the turbulent wake. The efficiency and accuracy of this method are validated through a comparison between the classical two scale method and the experimental data. |
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| Keywords: | ship turbulent wake bi-linear superposition method radar cross section (RCS) physical optics (PO) two scale method (TSM) |
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