Abstract
With the continuous advancement of rotor dynamic electromagnetic scattering research, the radar cross-section (RCS) of turbofan engines has attracted more and more attention. In order to solve the electromagnetic scattering characteristics of a biaxial multirotor turbofan engine, a dynamic scattering method (DSM) based on dynamic simulation and grid transformation is presented, where the static RCS of the engine and its components is calculated by physical optics and physical theory of diffraction. The results show that the electromagnetic scattering of the engine is periodic when the engine is working stably, while the rotors such as fans and turbines are the main factors affecting the dynamic electromagnetic scattering and the ducts greatly increase the overall RCS level of the engine. The proposed DSM is effective and efficient for studying the dynamic electromagnetic scattering characteristic of the turbofan engine.
Highlights
Stealth characteristics of aircraft engine intake and exhaust systems have been research hotspots, including infrared radiation, electromagnetic scattering, and noise [1,2]
The blade root forms a certain occlusion of the joint between the hub and the blade, so a small amount of orange yellow appears here. These results show that dynamic scattering method (DSM) could well simulate the rotation of the blade and calculate its electromagnetic scattering characteristics
The minimum value of the radar cross-section (RCS)-time curve of the low-pressure turbine is −26.35 dBm2 at t = 6.25 × 10−6 s, while the maximum value is −5.983 dBm2 at t = 5.937 × 10−4 s. These results show that the observation time has a non-negligible influence on the dynamic electromagnetic scattering of the low-pressure turbine
Summary
Stealth characteristics of aircraft engine intake and exhaust systems have been research hotspots, including infrared radiation, electromagnetic scattering, and noise [1,2]. In the face of the need for a comprehensive stealth design, the study of radar scattering characteristics of the turbofan engine is receiving attention [3]. The calculation of engine electromagnetic scattering has important practical significance for the stealth performance evaluation of the aircraft in the front-rear direction. Turbofan engines usually consist of a compressor, combustion chamber, high-pressure turbine, low-pressure turbine, and exhaust system [4,5], which makes its electromagnetic scattering characteristics extremely complicated [6]. The engine intake contributes to the forward radar cross-section (RCS) of the aircraft [7] and the entire airflow duct creates complex reflections of the electromagnetic waves [8,9]. Physical optics (PO) [3], iterative physical optics [6], and method of moment (MOM) [10] are used to solve the surface scattering of the inlet/outlet chambers
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
