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UID:0-363@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20180806T163000

DTEND;TZID=Asia/Jerusalem:20180806T173000

DTSTAMP:20230527T135707Z

URL:https://aerospace.technion.ac.il/events/noise-abatement-techniques-for
 -small-uav-propellers/

SUMMARY:Noise Abatement Techniques for Small UAV Propellers
DESCRIPTION:Lecturer:Yonatan Maor\n Faculty:Department of Aerospace Enginee
 ring\n Institute:Technion – Israel Institute of Technology\n Location:Cl
 assroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract:
  \n Details: \n Recent years have seen rapid growth in the small-unmanned 
 air vehicles (UAV) industry. This increase in drone usage causes many disr
 uptions in our everyday lives\, particularly noise. Increased noise regula
 tions around residential and commercial areas\, and the importance of a si
 lent flight in military settings\, mean that the acoustic signature of dro
 nes is of great concern. The use of electric propulsion systems has turned
  the propellers into a prominent source of noise. The quietness and the ef
 ficiency of propulsive system are key aspects in the design of UAV. Theref
 ore\, the ability to understand\, predict and decrease rotor noise has bec
 ome a major goal for both civil and military applications.\nWithin the sco
 pe the study\, acoustic signature and aerodynamics performance of off-the-
 shelf APC Electric and in-house designed and manufactured (3D printed) pro
 pellers was studied in an anechoic environment. The aim of the study was n
 ot only understand the link between aeroacoustic and aerodynamic performan
 ce\, but also suggest techniques to attenuate the acoustic signature. Trea
 tments included the addition of surface roughness\, applied a short distan
 ce downstream of the propeller’s leading edge\, and application of trail
 ing-edge serrations.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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