Numerical Simulation of Electromagnetic Scattering Characteristics of High-speed Flight Vehicle During Reentry Process

傅杨奥骁; 丁明松; 陈坚强; 杨鹰; 江涛; 董维中; 许勇

doi:10.12382/bgxb.2025.0351

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Numerical Simulation of Electromagnetic Scattering Characteristics of High-speed Flight Vehicle During Reentry Process

更新时间：2026-05-20

- Numerical Simulation of Electromagnetic Scattering Characteristics of High-speed Flight Vehicle During Reentry Process
- Acta Armamentarii (2026)
- 作者机构：
  
  1. 中国空气动力研究与发展中心计算空气动力研究所,四川,绵阳,621000
  2. 中国空气动力研究与发展中心超高速空气动力研究所,四川,绵阳,621000
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0351
  CLC： O357
- Received：07 May 2025，
  
  Online First：20 May 2026，
- 稿件说明：
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傅杨奥骁，丁明松，陈坚强，等. 飞行器再入过程的电磁散射特性数值模拟[J/OL]. 兵工学报, 2026(2026-05-20). https://doi.org/10.12382/bgxb.2025.0351.

DING M S, CHEN J Q, YANG Y, et al. Numerical simulation of electromagnetic scattering characteristics of high-speed flight vehicle during reentry process[J/OL]. Acta Armamentarii, 2026(2026-05-20). https://doi.org/10.12382/bgxb.2025.0351. (in Chinese)
傅杨奥骁，丁明松，陈坚强，等. 飞行器再入过程的电磁散射特性数值模拟[J/OL]. 兵工学报, 2026(2026-05-20). https://doi.org/10.12382/bgxb.2025.0351. DOI：

DING M S, CHEN J Q, YANG Y, et al. Numerical simulation of electromagnetic scattering characteristics of high-speed flight vehicle during reentry process[J/OL]. Acta Armamentarii, 2026(2026-05-20). https://doi.org/10.12382/bgxb.2025.0351. (in Chinese) DOI：

摘要

针对飞行器再入机动过程中飞行高度变化对电磁散射特性的影响问题，建立了三维非定常化学非平衡流动数值模拟方法，以及基于时域有限体积（Finite Volume Time Domain，FVTD）方法的等离子体包覆目标电磁散射特性数值模拟方法，研究了典型飞行器再入过程中飞行高度升高和下降过程对目标电磁散射特性的影响。研究结果表明：飞行高度快速变化时，流场中等离子体分布特性及等离子体包覆目标的电磁散射特性呈现明显的非定常效应，其对流场电子数密度的影响可达46%，对目标后向雷达散射截面（Radar Cross Section，RCS)面积的影响可达30%；在下降段时，由于来流密度的剧烈变化，相较于同高度定常状态结果，流场温度更低、电离反应更弱，致使流场中电子数密度下降、等离子体包覆目标的RCS降低，在上升段时，情况则正好相反；当飞行弹道存在高度起伏时，飞行高度变化的影响将更加显著，飞行过程中前后历经升高/下降过程到达同一高度时的目标后向RCS面积可相差50%；在当前状态下，采用特高频波段雷达时，等离子体鞘套及飞行高度变化对目标RCS的影响较明显；当采用L波段及S波段雷达时，影响明显减弱。

Abstract

Focus on the influence of flight altitude variation on electromagnetic scattering characteristics during reentry process

three-dimensional unsteady chemical non-equilibrium flow numerical simulation method and plasma-coated target numerical simulation method based onfinite volume time domain(FVTD)method are established. The influence of flight altitude rise/descent on electromagnetic scattering characteristics of typical aircraft is studied. The results show that when flight altitude changes

the plasma distribution in the flow field and the electromagnetic scattering of the plasma-coated target is obviously unsteady

the influence of unsteady effect on electron number density can reach up to 46% and that on backwardradar cross section (RCS)area can reach up to 30%. When the flight altitude descends

flow field temperature is lower and the ionization reaction is weaker compared with the steady state result of same altitude

which leads to the decrease of the electron number density in flow field and the decrease of the RCS of plasma coated target

while the situation is just the opposite when flight altitude rises; When there is altitude fluctuation in flight trajectory

the influence will be more significant

the backward RCS area of the target can differ by 50% when it reaches the same flight altitude through the process ofaltitude rising/descending; In present condition

when UHF band radar is used

the influence of plasma sheath and flight altitude variation on RCS is more obvious

while L-band and S-band radars are used

the influence is obviously weakened.

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references

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