Domain Decomposition Method for Scattering from an Aircraft with Jet Engine Inlet Cavity

Authors

  • Miodrag S. Tasic Department of General Electrical Engineering University of Belgrade–School of Electrical Engineering, Belgrade, 11120, Serbia
  • Branko M. Kolundzija Department of General Electrical Engineering University of Belgrade–School of Electrical Engineering, Belgrade, 11120, Serbia
  • Tomislav S. Milosevic Applications/Technical Support WIPL-D d.o.o., Belgrade, 11073, Serbia

Keywords:

Domain decomposition method, jet engine inlet, method of moments, monostatic radar cross section

Abstract

Monostatic radar cross section (RCS) of an combat aircraft is analyzed using iterative Least Square Method weighted domain decomposition method (LSM weighted DDM). The model of the 200 wavelengths long aircraft is made of perfect electric conductor (PEC). Inlet cavity of the jet engine is included in the model. The inlet has realistic shape, whereas cavity is closed with a PEC on the outlet side. Corresponding model without the inlet is also analyzed—the inlet contour is smoothed, and then it is closed with a PEC. Method of moments (MoM) solution is used as a reference. It is shown that the LSM weighted DDM solution can provide very good solution in just a few iterations if problematic parts of the structure are extracted in separate subdomains.

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References

H. T. Anastassu, “A review of electromagnetic scattering analysis for inlets cavities and open ducts,” IEEE Antennas and Propagation Magazine, vol. 45, no. 6, pp. 27-40, 2003.

E. Garcia, C. Delgado, I. G. Diego, and M. F. Catedra, “An iterative solution for electrically large problems combining the characteristic basis function method and the multilevel fast multipole algorithm,” IEEE Trans. Antennas Propag., vol. 56, no. 8, pp. 2363-2371, 2008.

M. Tasic and B. Kolundzija, “Iterative MoM-based technique for evaluation of bistatic RCS of electrically large scatterers,” Microwave Review - Mikrotalasna Revija, vol. 22, no. 2, Dec. 2016.

M. S. Tasic and B. M. Kolundzija, “Method of moment weighted domain decomposition method for scattering from large platforms,” in IEEE Transactions on Antennas and Propagation, vol. 66, no. 7, pp. 3577-3589, July 2018.

WIPL-D, Belgrade, Serbia. (2017). WIPL-D Pro v14.0—3D EM Solver. [Online]. Available: www. wipl-d.com

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Published

2021-07-14

How to Cite

[1]
Miodrag S. Tasic, Branko M. Kolundzija, and Tomislav S. Milosevic, “Domain Decomposition Method for Scattering from an Aircraft with Jet Engine Inlet Cavity”, ACES Journal, vol. 34, no. 02, pp. 331–336, Jul. 2021.

Issue

2019: Vol 34 Iss 2

Section

General Submission