Characteristics of Flow-Induced Noise in the Suction Nozzle of a Vacuum Cleaner with a Double-Blade Fan

이중 블레이드 팬이 장착된 진공청소기 브러쉬의 유동소음 특성

  • Park, I-Sun (Dept. of Mechanical Engineering, Sejong Univ.) ;
  • Sohn, Chae-Hoon (Dept. of Mechanical Engineering, Sejong Univ.) ;
  • Oh, Jang-Keun (Group of Vacuum Cleaner R&D, Samsung Gwangju Electronics)
  • 박이선 (세종대학교 기계공학과) ;
  • 손채훈 (세종대학교 기계공학과) ;
  • 오장근 (삼성광주전자 청소기개발그룹)
  • Received : 2010.02.19
  • Accepted : 2010.11.22
  • Published : 2011.02.01


The characteristics of noise generation in the suction nozzle of a vacuum cleaner are analyzed numerically and experimentally. First, the flow resistance induced by each element in the suction nozzle of a vacuum cleaner with a double-blade rotary fan is investigated numerically and its relation with flow-induced noise and suction performance is examined in an anechoic room. The flow resistance and vorticity in the suction nozzle are calculated, and it is found that they are closely related to flow-induced noise and that the upper limit of noise reduction is only 4 dBA. This upper limit can be achieved by changing the design of the brush nozzle. Two methods for noise reduction by enlargement of flow-inlet area and by optimization of the number of blades are tested. Finally, the effects of each method are verified experimentally.


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