Abstract
Noise source features of multi-propeller systems are experimentally studied in this paper. Noise sources on a pair of side-by-side placed small-scale propellers and a flying quad-copter are investigated separately using microphone arrays and the conventional beamforming algorithm. A high-intensity noise source spot is identified within the gap area between two propeller disks, which is a result of the interaction between the blade tip and upwash flow within the gap area. As the two propellers move away from each other, the noise source spot becomes weaker. Similarly, for a quad-copter under realistic flight conditions, the strongest noise sources are observed within the gap between each of two adjacent propellers, showing the feasibility and repeatability of the result obtained in the lab. The results discussed in this paper show that for the low-noise design of a multi-propeller drone, not only is the single propeller noise, but also the propeller interactional noise shall be taken into account.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
