Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Measurements of Velocity Profiles Inside a Partially Filled Pipeline Using PIV

PIV를 이용한 비만관내 유속 분포 측정

  • Choi, Jung-Geun (The Graduate School of Energy & Environment, Seoul National University of Technology) ;
  • Sung, Jae-Yong (Department of Mechanical Engineering, Seoul National University of Technology) ;
  • Lee, Moung-Ho (Department of Mechanical Engineering, Seoul National University of Technology)
  • 최중근 (서울산업대학교 에너지환경대학원) ;
  • 성재용 (서울산업대학교 기계공학과) ;
  • 이명호 (서울산업대학교 기계공학과)
  • Published : 2006.06.21
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Abstract

Velocity profiles inside a partially filled pipline have been investigated experimentally. To measure the velocity fields, a particle image velocimetry (PIV), which is a recent quantitative visualization technique, is applied. The velocity profile inside a circular pipe is well known, but if the pipe is partially filled, the problem is entirely different in the sense that the velocity distribution is significantly affected by the slope of pipe and filled water level, and so on. In order to calculate exact flow rate in the open channel or partially filled pipeline, three-dimensional velocity distributions at a given cross-sectional area are measured and compared the flow rates with the previously known empirical formula of Manning equation. The results show that the velocity profiles at center plane is considerably different from each other when the slope and water level change. Thus, The three-dimensional velocity profile can be the most plausible estimate for the exact flow rate.

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