Author(s)

Xiao Qian, Huang Jun, Yi Mingxu, Wu Yacong

Corresponding Author

Xiao Qian

ABSTRACT

The aerodynamic noise experiment of the ducted tail rotor includes the hysteresis state and the former flight state. In recent years, the most commonly used and reliable test technology of aerodynamic noise prediction and control in aircraft - "Microphone phase array" measurement technology, which is use a large number of calibrated microphone to identify the wave front of the spatial sound source and use the same phase detection space acoustic field section, determining the distribution of source, and then research the noise propagation characteristics and control strategy of full-size model. At present, the aerodynamic experiment of helicopters is mainly focused on the main rotor and tail rotor and the acoustic test of the tail rotor is less. Therefore, this paper has concentrate on the aerodynamic noise test of the ducted tail rotor, which is of great significance to the development of it.

KEYWORDS

ducted tail rotor, acoustic experiment, aerodynamic noise