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Quadrotor wake characteristics according to the change of the rotor separation distance

로터 간격에 따른 쿼드로터의 후류특성 변화 연구

  • Lee, Seungcheol (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Chae, Seokbong (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Kim, Jooha (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
  • Received : 2019.12.09
  • Accepted : 2019.12.26
  • Published : 2019.12.31

Abstract

Rotor wake interaction must be considered to understand the quadrotor flight, and the rotor separation distance is an important parameter that affects the rotor wake interaction. In this study, the wake characteristics were investigated with varying the rotor separation distance. The velocity field in the rotor wake was measured using digital PIV for hovering mode at Re = 34,000, and the wake boundaries from the inner and outer rotor tips were quantitatively compared with varying the rotor separation distance. The symmetric rotor-tip vortex shedding about the rotor axis was found at a large rotor separation distance. However, the wake boundary became more asymmetric about the rotor axis with decreasing the rotor separation distance. At the minimum rotor separation distance, in particular, a faster vortex decay was observed due to a strong vortex interaction between adjacent rotors.

Keywords

References

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