Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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3D-PTV Measurements of the Statistical Turbulent Properties on the Wake of a Sphere

3D-PTV에 의한 구 후류 난류통계량 계측

  • 도덕희 (한국해양대학교 기계 정보공학부) ;
  • 황태규 (한국해양대학교 기계 정보공학부) ;
  • 조용범 (한국해양대학교 기계 정보공학부) ;
  • 백태실 (포항제1대학, 자동차과) ;
  • 편용범 ((주)티엔텍)
  • Published : 2003.04.23
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Abstract

3D-PTV measurement was conducted on the wake of a sphere. The Reynolds number is 1130 with the diameter(d=30mm). The measurement system consisted of three CCD cameras, an image grabber, an Ar-Ion laser and a host computer. An eigenvalue analysis was introduced for the analysis on the wake. Statistical turbulent properties were quantitatively clarified using the time-consecutive instantaneous three-dimensional vectors obtained by the 3D-PTV system. The spatial distributions of the sphere wake showed strong relations with spiral motions of the vortcies shedded from the surface of the sphere.

Keywords