Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Ventilation Analysis according to Jet Fan Location in Long Tunnel

장대형 터널 내 제트 팬 위치에 따른 환기해석

  • Kang, Shin-Hyung (Department of Mechanical Engineering, Konyang University) ;
  • Byun, Ju-Suk (Songpa Technology Appraisal Center, Kibo Technology Fund) ;
  • Lee, Jin-Ho (School of Mechanical Engineering, Yonsei University)
  • Published : 2007.05.10
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Abstract

This paper studies the ventilation characteristics according to the jet fan location at the long road tunnel using the CFD software 'FLUENT' which is based on the finite volume method. The tunnel model used in the analysis has a length of 1600m, a cross sectional area of $120m^3$, and is composed of 3 lanes and one way. The velocity profile, the distribution of CO concentration and the ventilation flow rate within the tunnel are analyzed, respectively. In the analysis, it is found that the dependence of the ventilation flow rate upon the jet fan location is small, but the CO concentration in the tunnel is at the lowest when the jet fans are installed near the tunnel outlet. An air stream right below the jet fan is almost inactive due to the strong stream injection near the jet fan. Thus, the pollution level below the jet fan must be higher than the other area.

Keywords

References

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