弹道导弹助推段尾喷焰RCS特性研究

RCS of Ballistic Missile Plume in Boost Phase of Flight

研究了弹道导弹助推段尾喷焰在HF频段的RCS特性。通过研究尾喷焰的等离子体性质,推导了尾喷焰全反射的临界电子浓度,建立了尾喷焰的等离子体模型。采用流体力学的方法分析了尾焰上流体动力学参数的分布,建立了尾喷焰的流体力学模型。最后采用计算电磁学的矩量法计算了助推段弹道导弹尾喷焰的RCS特性,通过商业软件Feko 5.4验证了计算方法的准确性。研究结果为天波超视距雷达的精确设计提供了依据。

The radar cross section（RCS） of ballistic missile in the boost phase of flight at high fre- queney（HF） band is studied. To set up plasma model of the plume, the plasma property is studied ; be- sides, the critical electron density is produced. Methods of hydrodynamics is adopted to analyze the dis- tribution of hydro dynamical parameters, so that the hydrodynamic model is set up as well . Finally, RCS of the ballistic missile plume in the boost phase of fight is calculated with method of moment （MOM） al- gorithm and examined by Feko 5.4. The research provides principles for designing over-the-horizon radar （ OTHR）.