Affiliation:
1. Hamburg University of Applied Sciences, 20099 Hamburg, Germany
Abstract
The large interaction tonal noise of counter-rotating propellers significantly restricts their application in civil aviation. A pair of counter-rotating propellers was simulated by the lattice Boltzmann method, and the far-field noise was predicted by the Ffowcs Williams and Hawkings analogy. Dynamic mode decomposition was introduced to analyze the surface pressure contribution to far-field noise and to provide insights on the cancellation mechanism of the noise source distribution for the interaction tone. It was found that the cancellation effect is closely related to the relative position between the front blade wake and rear blade element. By adjusting the rear blade sweep and, hence, changing the relative position, the interaction tone can be reduced effectively.
Funder
AVIC Aerodynamics Research Institute, the Laboratory of Aerodynamic Noise Control
National Natural Science Foundation of China
Key laboratory of Aeroacoustics
Research and Development Center
Publisher
American Institute of Aeronautics and Astronautics (AIAA)
Reference53 articles.
1. GroenewegJ. F.BoberL. J. “NASA Advanced Propeller Research,” NASA TM 101361, 1988, https://ntrs.nasa.gov/citations/19890006542.
2. Noise of a model high speed counterrotation propeller at simulated takeoff/approach conditions (F7/A7)
3. BlockP. J. W. “Experimental Study of the Effects of Installation on Single-and Counter-Rotation Propeller Noise,” NASA TP-2541, 1986.
4. KinganM.SelfR. “Counter-Rotation Propeller Tip Vortex Interaction Noise,” AIAA Paper 2019-3135, 2009. 10.2514/6.2009-3135