Static and Dynamic Scattering Characteristics of Complex Cavity with Rotating Blades

The scattering characteristics of complex cavity with rotating blades are important information for target recognition. On the one hand, the RCS of a cavity with blades inside varies greatly when the blades rotate at different position. On the other hand, modulation effect will reveal when the blades rotate at high speed. In this paper, the scattering characteristics of a fan model is simulated and tested in static and dynamic states, respectively. Some conclusions are draw which are useful for target recognition.