Review on Noise Mitigation Techniques of UAV Propeller

Ansh Vishal ； Ripinder Singh ； Md Ibrahim Ashraf ； Rajesh Kumar Saluja ； Sanjay Singh ； Nikita Dhiman

《Journal of Aeronautics, Astronautics and Aviation》 56卷5期 Vol.56 No.5 (2024/10) Pp. 917-926

https://doi.org/10.6125/JoAAA.202410_56(5).01

摘要

Unmanned aerial vehicles (UAVs) are becoming very popular because of their versatile use in various kinds of fields, ranging from military applications to domestic payload deliveries. With their increasing use, noise-associated issues are becoming a major concern as well. This apprehension hampers UAV usage in urban areas and is bothersome for the animals, birds, and aquatic species in the nearby surroundings. To operate a UAV in any region without exceeding any government-imposed noise level limits, it is necessary to bring up with a quick fix that can help to reduce the noise produced by the UAVs. Aiming at the problem of excessive sound generated by the UAV propellers, this review focuses on noise reduction techniques. The paper focuses on passive noise reduction techniques like serrated propellers, boundary layer tripping and gurney flaps. Out of all the techniques explained, we are suggesting the use of trailing edge serrations, which are inspired from the wings of the owl and are known for having silent flight. Hence serrations made onto the trailing edge (TE) of UAV propellers will help to lower the acoustic noise levels produced.

關鍵字

UAV ； Aeroacoustics ； Bio-inspired ； Serrated Propellers ； OASPL

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