International Journal of Air-Conditioning and Refrigeration

  • 제11권4호
  • /
  • Pages.178-187
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  • 2003
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  • 2010-1325(pISSN)
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  • 2010-1333(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

Numerical Analysis on the Effect of Parameters that Affect the Flow Rate through the Tunnel with Jet Fan Ventilation System

  • Kim, Sa-Ryang (Department of Precision Mechanical Engineering, Kangnung National University) ;
  • Hur, Nahmkeon (Department of Mechanical Engineering, Sogang University) ;
  • Kim, Young-Il (Thermal/Flow Control Research Center, KIST) ;
  • Kim, Ki-Jung (Graduate School, Sogang University)
  • 발행 : 2003.12.01
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초록

In this study, ventilation flow rate and pressure rise through a tunnel are simulated numerically using computational fluid dynamics (CFD) for various conditions such as roughness height of the surface of tunnel, swirl angle and hub/tip ratio of jet fan, and entrance and exit effects. By using a modified wall function, friction factor can be predicted with respect to the Moody chart within 10% of error for the circular pipe flow and 15% for the present tunnel. For more accurate design, the effect of the swirl angle and hub/tip ratio of jet fan, which is not included in the theoretical equation of pressure rise by jet fan needs to be considered.

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참고문헌

  1. Martegani, A. D., Pavesi, G. and Barbetta, C., 2000, Experimental investigation of interaction of plain jet fans mounted in series, 10th International Symposium on Aerodynamics and Ventilation of Vehicle Tunnel, BHR Group, pp. 1055-1078
  2. Saika, T., Nakajima, K. and Setoyama, S., 2000, Jet fan thrust performance evaluation installed in road tunnel, 10th International Symposium on Aerodynamics and Ventilation of Vehicle Tunnel, BHR Group, pp. 1079-1088
  3. Hur, N., 1999, Ventilation simulation in the long rail tunnel of Young-dong line, Report of Dae-Yang Air Conditioning Co. Ltd., SGI-19997012, Industrial Technology Research Center, Sogang Univ.
  4. Mizuno, A., Nakajima, K. and Kanoh, T., 1999, Study on the installation interval of jet fans for road tunnel ventilation, Proceedings of Sixth STAR-CD Users' Seminar, CD- Adapco-Japan, pp. 13-15
  5. Lim, J.-S. and Shin, D.-S., 2001, Numerical simulation of fluid field around a road tunnel, Proceedings of the SAREK Summer Annual Conference, pp. 1079-1083
  6. Yang, P.-S., Cho, Y.-J. and Lee, J.-H., 1998, A study on the ventilation in a long road tunnel, KSME J. (B), Vol. 22, No.8, pp.1091-1100
  7. STAR-CD Version 3.1 Manual, 1999, Computational Dynamics Limited
  8. Diaz, J., Kramesberge, F. and Gaehler, 1991, Optimized jet fan installation, 7th International Symposium on Aerodynamics and Ventilation of Vehicle Tunnel, BHR Group, Brington, UK, pp, 821-826
  9. Technology of Tunnel Ventilation, 2000, Bumchang Engineering, pp. 62-76
  10. Cho, K. R., Yoo, J.Y. and Kang, S. H. (Translated), 2000, Fluid Mechanics, 4th ed., MeGraw-Hill Korea, pp.350-351