Learning radar cross section of an intermeshing-rotor helicopter with blade pitch
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 20 April 2023
Issue publication date: 21 July 2023
Abstract
Purpose
This study aims to study the radar cross-section (RCS) of an intermeshing rotor with blade pitch.
Design/methodology/approach
The variation of rotor blade pitch is designed into three modes: fixed mode, linear mode and smooth mode. The dynamic process of two crossed rotors is simulated, where the instantaneous RCS is calculated by physical optics and physical theory of diffraction.
Findings
Increasing the pitch angle in the fixed mode can reduce the average RCS of rotor at the given head azimuth. The RCS curve of helicopter in linear mode and smooth mode will have a large peak in the side direction at the given moment. Although the blade pitch in smooth mode is generally larger than that in fixed mode, the smooth mode is conducive to reducing the peak and mean value of helicopter RCS at the given heading azimuth.
Originality/value
The calculation method for analyzing RCS of intermeshing rotor with variable blade pitch is established.
Keywords
Acknowledgements
Funding: The project funded by China Postdoctoral Science Foundation (Grant Nos. BX20200035, 2020M680005).
Conflicts of interest statement: There is no conflict of interest.
Citation
Zhou, Z. and Huang, J. (2023), "Learning radar cross section of an intermeshing-rotor helicopter with blade pitch", Aircraft Engineering and Aerospace Technology, Vol. 95 No. 8, pp. 1172-1183. https://doi.org/10.1108/AEAT-12-2022-0340
Publisher
:Emerald Publishing Limited
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