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CO concentration distribution in a tunnel model closed at left end side using CFD

  • Peng, Lu (School of Mechanical Design Engineering, Graduate School, Chonnam National University) ;
  • Lee, Yong-Ho (School of Mechanical Design Engineering, Chonnam National University)
  • Received : 2013.02.07
  • Accepted : 2013.05.13
  • Published : 2013.05.31

Abstract

A primary air pollutant as an indicator of air quality released from incomplete combustion is Carbon monoxide. A study of the distributions of CO concentration with no heat source in a tunnel model closed at left end side is simulated with a commercial CFD code. The tunnel model is used to investigate the CO concentration distributions at three Reynolds numbers of 990, 1970, and 3290. which are computed by the inlet velocities of 0.3, 0.6 and 1.0 m/s. The CFD predictive approaches can be useful for a better design to analyze the distributions of CO concentrations. In the case of the tunnel model closed at left end side alone, the concentration changes of x/H=-5 and -2.5 have the similar laminar characteristics like the case of the tunnel model closed at both end sides expecially at low values of Reynolds number. Irregular average CO concentration variations at Re=1790 are considered that the transition from laminar to turbulent flow occurs even in three different tunnel models.

Keywords

References

  1. A. Abbasloo, J. F. Kaljahi, and F. Esmaeilzadeh, "Prediction of three dimensional CO concentration distribution in zand tunnel of shiraz using computational fluid dynamic method", Journal of Applied Environmental and Biological Sciences, vol. 2, no. 1, pp. 67-76, 2012.
  2. F. C. McQuiston, J. D. Parker, and J. D. Spitler, Heating, Ventilating, and Air Conditioning: Analysis and Design, 6/e, John Wiley & Sons, Inc. 2005.
  3. G. E. P. Box, G. M. Jenkins, Time Series Analysis, Forecasting and Control. Holden-Days, San Francisco, 1970.
  4. A. B. Chelani and S. Devotta, "Prediction of ambient carbon monoxide concentration using nonlinear time series analysis technique", Transportation Research Part D 12, pp. 569-600, 2007.
  5. P. Sharma and M. Khare, "Real-time prediction of extreme ambient carbon monoxide concentrations due to vehicular exhaust emissions using univariate linear stochastic models", Transportation Research Part D 5, pp. 59-69, 2000. https://doi.org/10.1016/S1361-9209(99)00024-3
  6. K. Zhang and S. Batterman, "Near-road air pollutant concentrations of CO and $PM_{2.5}$ : A comparison of MOBILE6.2/CALINE4 and generalized additive models", Atmosphere Environment 44, pp. 1740-1748, 2010. https://doi.org/10.1016/j.atmosenv.2010.02.008
  7. Olivier Vauquelin, "Experimental simulations of fire-induced smoke control in tunnels using an 'air-helium reduced scale model' : Principle, limitations, results and future", Tunnelling and Underground space Technology, vol. 23, pp. 171-178, 2008. https://doi.org/10.1016/j.tust.2007.04.003
  8. C. C. Hwang, J. C. Edwards, "The critical ventilation velocity in tunnel fires - a computer simulation", Fire Safety Journal, vol. 40, pp.213-244, 2005. https://doi.org/10.1016/j.firesaf.2004.11.001
  9. C. C. Hwang, J. D. Wargo, "Experimental study of thermally generated reverse stratified layers in a fire tunnel", Combust Flame, vol .66, pp. 171-80, 1986. https://doi.org/10.1016/0010-2180(86)90089-1
  10. Wu, Y. and Baker, M. Z. A, "Control of smoke flow in tunnel fires using longitudinal ventilation systems - a study of the critical velocity", Fire Safety Journal, vol. 35 pp. 363-390, 2000. https://doi.org/10.1016/S0379-7112(00)00031-X
  11. Li Kun, Ding Cui, You Chang-fu. "Influence of ventilation tube rupture from fires on secondary catastrophes in tunnel", First international symposium on mine safety science and engineering, Procedia Engineering, vol. 26, pp.75-83, 2011.
  12. Y.-H. Lee, "Flow behavior in a rectangular tunnel opened and closed at both sides using CFD". Journal of the Korean Society of Marine Engineering, vol. 36, no. 3, pp. 368-377, 2012. https://doi.org/10.5916/jkosme.2012.36.3.368
  13. Y.-H. Lee. "Experimental and CFD simulations of polluted air behavior in rectangular tunnels", Journal of the Korean society of marin engineering, vol. 35, no. 5, p. 608-615, 2011 (in Korean). https://doi.org/10.5916/jkosme.2011.35.5.608
  14. Y.-H, Lee. "Distribution of CO concentration in two tunnel models using CFD", Journal of the Korean Society of Marine Engineering, vol. 36, no. 7, pp. 910-918, 2012. https://doi.org/10.5916/jkosme.2012.36.7.910