Noise Reduction on a Low Reynolds Number Propeller

Noise Reduction on a Low Reynolds Number Propeller

With the mass application of drones in daily work, more attention has been paid to the noise problem. The noise generation mechanism of low Reynolds number propellers is studied in this paper. It is found that there are laminar separation bubbles on the suction surface, causing an increase in broadb...

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Veröffentlicht in:Journal of physics. Conference series 2023-08, Vol.2569 (1), p.12050
Hauptverfasser: Zhao, Tianming, Zhao, Longzhi, Zhang, Yifei, Liu, Lu, Xu, Lijun
Format: Artikel
Sprache:eng
Schlagworte:
Boundary layers
Broadband
Bubbles
Fluid flow
Hovering
Noise generation
Noise reduction
Physics
Propeller noise
Propellers
Suction
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Zhao, Longzhi
Zhang, Yifei
Liu, Lu
Xu, Lijun
description With the mass application of drones in daily work, more attention has been paid to the noise problem. The noise generation mechanism of low Reynolds number propellers is studied in this paper. It is found that there are laminar separation bubbles on the suction surface, causing an increase in broadband noise. Leading edge boundary layer trips are added to remove the bubbles. Finally, experimental measurements indicate that isolated propeller noise reduction is up to 5 dBA. It still has a 1.5 dBA reduction in the full-loaded hovering drone test, which brings many conveniences for daily work.
doi_str_mv 10.1088/1742-6596/2569/1/012050
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subjects Boundary layers
Broadband
Bubbles
Fluid flow
Hovering
Noise generation
Noise reduction
Physics
Propeller noise
Propellers
Suction
title Noise Reduction on a Low Reynolds Number Propeller
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