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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

A Numerical Analysis on the Effect of Parameters for the Flow Rate through the Tunnel with Jet Fan Ventilating System

제트 홴 방식 환기시스템을 사용하는 터널의 환기량에 영향을 주는 인자에 대한 수치해석 검토

  • 김사량 (강릉대학교 정밀기계공학과) ;
  • 김기정 (서강대학교 대학원 기계공학) ;
  • 허남건 (서강대학교 기계공학) ;
  • 김영일 (한국과학기술연구원 열유동제어센터)
  • Published : 2002.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, ventilation flow rates and pressure rises through a road tunnel are simulated numerically using CFD with the various conditions such as roughness height, swirl angle of jet fan, entrance and exit effect and hub to tip ratio. By using a modified wall function, friction factor can be predicted under 10％ of error with respect to the Moody chart for the circular pipe flow and 15％, for the present tunnel. For more precise design, the effects of the swirl angle and hub to tip ratio of jet fan, which is not included in the theoretical equation of pressure rise by jet fan are necessary to be considered.

Keywords

References

  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.(8), Vol. 22, No.8, pp. 1091-1100
  7. STAR-CD Verion 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 Vehic1e Tunnel, BRR 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., McGraw-Hill KOREA, pp. 350-351