Volume 29 Issue 11
Nov.  2014
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CUI Jin-hui, SHANG Shou-tang, YANG Qing-zhen, LI Zhao-hong, CHEN Li-hai. Application of ray-tracing method in calculating RCS for spherical convergent flap nozzle[J]. Journal of Aerospace Power, 2014, 29(11): 2613-2620. doi: 10.13224/j.cnki.jasp.2014.11.011
Citation: CUI Jin-hui, SHANG Shou-tang, YANG Qing-zhen, LI Zhao-hong, CHEN Li-hai. Application of ray-tracing method in calculating RCS for spherical convergent flap nozzle[J]. Journal of Aerospace Power, 2014, 29(11): 2613-2620. doi: 10.13224/j.cnki.jasp.2014.11.011

Application of ray-tracing method in calculating RCS for spherical convergent flap nozzle

doi: 10.13224/j.cnki.jasp.2014.11.011
  • Received Date: 2013-10-29
  • Publish Date: 2014-11-28
  • Numerical simulation of spherical convergent flap nozzles with different trailing edges shaping measures was finished using the self-developed electromagnetic scattering characteristic program based on the ray-tracing method. Radar cross section (RCS) of inner cavity scattering field and edge diffraction field was obtained for above several different SCFN. Meanwhile, induced electric current of inner cavity wall at different azimuth angles was calculated. With the method of analyzing the induced electric current, the change law of RCS was explained essentially. The analysis results show that the shaping measures for the trailing edge of the nozzle have a significant and obvious effect on decreasing the RCS of edge diffraction field and improving the electromagnetic stealth performance. Compared with ordinary occultation algorithm, the ray-tracing method shortens computational cycle by 21%, and improves the computing efficiency obviously. The analysis method using induced electric current can explain the change law of RCS clearly and intuitively with a high reliability.

     

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