Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Aerodynamic Drag Reduction in Cylindrical Model Using DBD Plasma Actuator

DBD 플라즈마 구동기를 이용한 원통모델의 공기저항저감

  • Lee, Changwook (Department of Aerospace Engineering, College of Engineering, Chosun University) ;
  • Sim, Ju-Hyeong (Department of Aerospace Engineering, College of Engineering, Chosun University) ;
  • Han, Sunghyun (Department of Aerospace Engineering, College of Engineering, Chosun University) ;
  • Yun, Su Hwan (High-speed Railroad Systems Department, Korea Railroad Research Institut) ;
  • Kim, Taegyu (Department of Aerospace Engineering, College of Engineering, Chosun University)
  • Received : 2014.03.17
  • Accepted : 2014.10.04
  • Published : 2015.02.01
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Abstract

Dielectric barrier discharge (DBD) plasma actuator was designed to reduce aerodynamic drag in a cylindrical model and wind tunnel test was performed at various wind velocities. In addition, computational fluid dynamics (CFD) analysis and flow visualization were used to investigate the effect of the plasma on the flow stream in the cylinderical model. At low wind velocity, the plasma actuator had no effects because flow separation did not appear. The aerodynamic drag was reduced by 14% at 14 m/s and by 27% at 17 m/s, respectively. It was confirmed by CFD analysis and flow visualization that the DBD plasma actuator decreased in pressure difference around the cylindrical model, thus decreasing the magnitude of wake vortex.

원통 모델에 공기저항저감 효과를 검증하기 위해서 원통형에 적합한 유연성 플라즈마 구동기를 제작하였다. 다양한 풍속에서 플라즈마 유동제어 풍동시험을 수행하였으며, CFD 해석과 유동가시화를 수행하였다. 풍속이 느린 저속 구간에서는 유동박리가 발생하지 않아 플라즈마 유동제어 효과가 없었다. 풍속 14 m/s 에서 14% 정도 항력이 저감되었으며, 풍속이 증가된 17 m/s 의 경우 항력이 27% 저감되었다. CFD 해석과 유동가시화의 비교를 통해 DBD플라즈마 구동기는 원통 주변의 압력차를 감소시켜 와류의 크기가 줄어든 것으로 확인되었다.

Keywords

References

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