| CHEN Hanze,YANG Shengnan,CHENG Ronghui,DENG Hongwei,WANG Qun,LU Haohao.Numerical Calculation of Forward Radar Scattering Characteristics of Axisymmetric Nozzle[J].航空发动机,2026,52(1):122-128 |
| Numerical Calculation of Forward Radar Scattering Characteristics of Axisymmetric Nozzle |
| DOI：10.12482/ISSN.1672-3147.20230508002 |
| Key Words:axisymmetric nozzle radar scattering characteristics inductive current multilevel fast multipole algorithm polarization signal feature strength aeroengine |
| Author Name | Affiliation | | CHEN Hanze | AECC Shenyang Engine Research Institute,Shenyang 110015,China；
National Key Laboratory of Aerospace Power System and Plasma Technology,Shenyang 110015,China | | YANG Shengnan | AECC Shenyang Engine Research Institute,Shenyang 110015,China；
National Key Laboratory of Aerospace Power System and Plasma Technology,Shenyang 110015,China | | CHENG Ronghui | AECC Shenyang Engine Research Institute,Shenyang 110015,China | | DENG Hongwei | AECC Shenyang Engine Research Institute,Shenyang 110015,China；
National Key Laboratory of Aerospace Power System and Plasma Technology,Shenyang 110015,China | | WANG Qun | AECC Shenyang Engine Research Institute,Shenyang 110015,China；
National Key Laboratory of Aerospace Power System and Plasma Technology,Shenyang 110015,China | | LU Haohao | AECC Shenyang Engine Research Institute,Shenyang 110015,China；
National Key Laboratory of Aerospace Power System and Plasma Technology,Shenyang 110015,China |
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| Abstract:To investigate the forward radar scattering characteristics of aircraft engine nozzles, two axisymmetric nozzle physical
models under different cruising conditions were established. The RCS distribution and induced current distribution for both horizontal and
vertical polarization at typical L-band frequencies were simulated and analyzed using the multilevel fast multipole algorithm(MLFMA). The
results indicate that under different nozzle operating conditions, changes in the tilt angle and overlapping state of the external adjustment
plate lead to variations in the signal intensity and scattering direction of reflected,diffracted,and surface waves generated by radar wave
illumination, thereby altering the oscillation behavior of the RCS. As the azimuth angle increases,the reflected wave signal strengthens
gradually,and the overall forward RCS of the nozzle shows an oscillatory upward trend, which is more pronounced under horizontal polariza?
tion. At different elevation angles,variations in the radar-illuminated area result in significant differences in the forward RCS distribution of
the nozzle. With an increase in elevation angle, the maximum changes in the average RCS of horizontal and vertical polarization reach
19.1% and 55.9%, respectively, demonstrating strong angular sensitivity. |
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