An efficient algorithm for the RCS modulation prediction from jet inlet-engines

Author

Barka, A. ; Bobillot, G.

Author_Institution

ONERA, Chatillon, France

Volume

4

fYear

1999

fDate

11-16 July 1999

Firstpage

2566

Abstract

The electromagnetic scattering from the interior of a complex jet engine inlet contributes significantly to the overall radar cross section (RCS) of a modern jet aircraft. Previously we have presented a general multi-domain and multi-method coupling scheme, based on generalized scattering matrices computations of three-dimensional inlet subdomains. This method is really suitable in a context of parametric investigations (local inlet engine modifications). In this paper we discuss a new algorithm providing the radar modulation due to a set of rotating blades computed with only one solution for any blade position. A validation of this method is presented on a simplified rotating structure connected with an evolutive inlet.

Keywords

S-matrix theory; aerospace engines; aircraft; electromagnetic wave scattering; finite element analysis; integral equations; modulation; radar cross-sections; 3D finite element method; EFIE solver; RCS modulation prediction; algorithm; blade position; efficient algorithm; electromagnetic scattering; evolutive inlet; generalized scattering matrices; jet aircraft; jet inlet-engines; local inlet engine modifications; multi-domain coupling scheme; multi-method coupling scheme; parametric investigations; radar cross section; radar modulation; rotating blades; rotating structure; three-dimensional inlet subdomains; Aircraft propulsion; Assembly; Blades; Character generation; Differential equations; Electromagnetic scattering; Finite element methods; Jet engines; Radar cross section; Radar scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1999. IEEE

Conference_Location

Orlando, FL, USA

Print_ISBN

0-7803-5639-x

Type

conf

DOI

10.1109/APS.1999.789333

Filename

789333