Numerical Simulation of Radar Scattering Characteristics of Axisymmetric Plug Nozzle

Journal of Propulsion Technology ›› 2018, Vol. 39 ›› Issue (1): 86-91.

• Aero-thermodynamics • Previous Articles Next Articles

Numerical Simulation of Radar Scattering Characteristics of Axisymmetric Plug Nozzle

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710129，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710129，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710129，China and School of Power and Energy，Northwestern Polytechnical University，Xi’an 710129，China

Published:2021-08-15

轴对称塞式喷管电磁散射特性数值模拟

陈玲玲,杨青真,陈立海,施永强

西北工业大学动力与能源学院，陕西西安 710129,西北工业大学动力与能源学院，陕西西安 710129,西北工业大学动力与能源学院，陕西西安 710129,西北工业大学动力与能源学院，陕西西安 710129

作者简介:陈玲玲，女，博士，研究领域为发动机总体设计。E-mail: chen.lingling@outlook.com 通讯作者:施永强，男，博士，副教授，研究领域为叶轮机械气动热力学、发动机内流气动热力学、发动机隐身。

Abstract

Abstract: To investigate the radar stealth characteristics of the nozzle with plug， based on the axisymmetric nozzle from a certain turbofan engine， a series of nozzles with plugs of different taper were studied in the current work. The radar scattering characteristics of the nozzles were calculated by a program developed from Iterative Physical Optics (IPO) and Equivalent Edge Current (EEC). Compared with the baseline nozzle， except for the condition of zero degree elevation angles， in which the radar cross-section (RCS) increases by 8.14% and 11.77% under the condition of horizontal and vertical polarization， respectively， the RCS with plugs decreases effectively. And with the plug of the optimal taper， the RCS of the nozzle can be decreased by 13.2% and 15.2% under the condition of horizontal and vertical polarization， respectively.

Key words: Plug nozzles；Plug；Half cone-apex angle of rear plug；Radar cross-section (RCS)

摘要： 为研究塞锥存在对喷管雷达隐身特性的影响，以涡扇发动机轴对称喷管为基础，设计了加有不同锥度塞锥的塞式喷管；运用自主开发的基于物理光学迭代(IPO)和等效边缘电磁流(EEC)方法的程序对各型塞式喷管的雷达散射特性进行了数值计算并与原轴对称喷管特性进行对比分析。结果表明:塞式喷管能够有效降低喷管雷达散射截面(RCS)；但0°仰俯角附近会有局部升高，在水平极化和垂直极化方式下RCS值分别比原喷管最大增大8.14%，11.77%；存在最优锥度，在水平和垂直极化方式下都能够最大程度减小喷管总场RCS均值，使得其比原喷管分别减缩13.2%，15.2%。

关键词: 塞式喷管；塞锥；后锥半锥顶角；雷达散射截面(RCS)

CHEN Ling-ling,YANG Qing-zhen,CHEN Li-hai,SHI Yong-qiang. Numerical Simulation of Radar Scattering Characteristics of Axisymmetric Plug Nozzle[J]. Journal of Propulsion Technology, 2018, 39(1): 86-91.

陈玲玲,杨青真,陈立海,施永强. 轴对称塞式喷管电磁散射特性数值模拟[J]. 推进技术, 2018, 39(1): 86-91.

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Numerical Simulation of Radar Scattering Characteristics of Axisymmetric Plug Nozzle

轴对称塞式喷管电磁散射特性数值模拟

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