Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Experimental study on the aerodynamic effects of slots at a rotor tip

로터 끝 슬롯의 공기역학적 효과에 대한 실험 연구

  • Yisu Shin (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Seungcheol Lee (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Jooha Kim (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
  • Received : 2023.10.23
  • Accepted : 2023.11.14
  • Published : 2023.11.30
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Abstract

In this study, we investigate the effects of slots installed on the tip of a rotor blade on aerodynamic characteristics. The slots weaken the strength and spatial coherence of the tip vortex at early vortex age and accelerate the dissipation of the generated tip vortex. Accordingly, the turbulence intensity of the rotor wake is reduced at both near and far wake, which leads to a reduction in broadband noise. Tonal noise is also reduced by mitigation of tip vortices, but tonal noise reduction is limited to a narrower range of azimuths than broadband noise due to the extinction of tip vortices. In addition, slots reduce both mean thrust and thrust fluctuations. Reduction in thrust fluctuations leads to a reduction in blade loading noise, resulting in a reduction in tonal noise.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원(2023R1A2C1005420)을 받아 수행되었으며, 이에 감사 드립니다.

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