Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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A Study on Flow Characteristics of Polluted Air in Rectangular Tunnel Models Using a PIV System

  • Koh, Young-Ha (Dept. of High-tech. CAD/CAM, Chosun College University of Science & Technology) ;
  • Park, Sang-Kyoo (College of Engineering Science, Chonnam National University (Yeosu Campus)) ;
  • Yang, Hei-Cheon (College of Engineering Science, Chonnam National University (Yeosu Campus)) ;
  • Lee, Yong-Ho (College of Engineering Science, Chonnam National University (Yeosu Campus))
  • Received : 2010.03.27
  • Accepted : 2010.09.27
  • Published : 2010.09.30
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Abstract

The objective of this study is to investigate flow behaviors of polluted air in order to prevent the impact of disaster in a tunnel. This paper presents the experimental results qualitatively in terms of flow characteristics in two kinds of rectangular tunnel models in which each distance from the centerline above the inlet vent to the exhaust vent is 0 and 60 mm, respectively. The olive oil is used as the tracer particles. The flow is tested at the flow rate of $14.16{\times}10^{-4}\;m^3/s$ and the inlet vent velocity of 1.1 m/s with the kinematic viscosity of air. The aspect ratio of the model test section is 10. The average velocity vectors, streamlines, and vorticity distributions are measured and analyzed by the Flow Manager in a particle image velocimetry(PIV) system. The PIV technology gives three different velocity distributions according to observational points of view for understanding the polluted air flow characteristics. The maximum value of mean velocity generally occurs in the inlet and outlet vent regions in the tunnel models.

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References

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