Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Characteristic analysis of flowfield around a square prism having a detached splitter plate using the PIV

PIV에 의한 분리된 분할판을 가진 정방형주 주위의 유동장 특성 분석

  • 노기덕 (경상대학교 기계시스템공학과.농업생명과학연구원)
  • Received : 2012.11.13
  • Accepted : 2013.03.05
  • Published : 2013.05.31
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Abstract

The Flowfield characteristics of a square prism having a detached splitter plate at the wake region were investigated by visualization of the flow field using PIV. The experimental parameters were the width ratios(H/B=0.5~1.5) of the splitter plate to the prism width and the gap ratios (G/B=0~2) between the prism and the splitter plate. As the results the Strouhal number measured at the wake region of the detached splitter plate was decreased with the width ratio and the gap ratio. The clockwise vortex at the upside of the splitter plate and counterclockwise vortex at the downside were represented, the size of these vortices were increased with the width of the splitter plate. The reverse flow was represented at the wake region of the square prism having a detached splitter plate, the size of this reverse flow was increased with the width of the splitter plate.

본 연구는 후류측에 분리된 분할판(Detached splitter plate)을 설치한 경우 정방형주의 주위의 유동장 특성을 분할판의 폭과 정방형주 후면에서부터 분할판까지의 간격을 변수로 하여 PIV를 이용한 가시화실험으로 파악한 것이다. 그 결과를 요약하면 다음과 같다. 분할판 후류측에서 측정한 Strouhal 수는 분할판의 폭비 및 간격비가 증가할수록 감소했다. 분할판의 상부에는 시계방향의, 하부에는 반시계방향의 볼테스가 존재하였고, 이 볼텍스 영역의 크기는 분할판 폭비가 클수록 크게 나타났다. 분할판을 가진 정방형주 후류측에는 역류가 존재하였고, 이 역류의 크기는 분할판 폭비가 클수록 증가했다.

Keywords

References

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