Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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PIV Measurement of Circular Cylinder Wake Using Vortex Tracking Phase-Average Technique

와추적 위상평균 기법을 이용한 원주후류의 PIV측정

  • Kim, Gyeong-Cheon (Mechanical Technology Research Center, Dept.of Mechanical Engineering, Busan National University) ;
  • Yun, Sang-Yeol (Dept.of Mechanical Engineering, Graduate School of Busan National University) ;
  • Kim, Sang-Gi (Dept.of Mechanical Engineering, Graduate School of Busan National University) ;
  • Bu, Jeong-Suk
  • 김경천 (부산대학교 기계공학부, 기계기술연구소) ;
  • 윤상열 (부산대학교 대학원 기계공학과) ;
  • 김상기 (부산대학교 대학원 기계공학과) ;
  • 부정숙
  • Published : 2001.07.01
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Abstract

A new phase-average technique using instantaneous velocity fields obtained by a PIV method has been developed. The technique tracks vorticity centers and estimates the value of circulation for a chosen domain. The locations of vortex-centers and the magnitudes of circulation are matched together then showing a sine wave feature due to the periodic vortex shedding from the circular cylinder. Ensemble averaged and phase averaged velocity fields are successfully measured for the circular cylinder wake where Reynolds number is 3900 based on free stream velocity and cylinder diameter. The convection velocities of the vortices center and the vortex shedding frequency were measured by a single hot-wire probe.

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References

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