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

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

DOI QR Code

Ventilation Characteristics by Traffic Piston Effect in Underground Network-type Road Junction

네트워크형 지하도로 입체교차로 내의 교통환기력에 의한 환기 특성

  • Kim, Nam-Young (Mechanical and Electrical Division, Sambo Engineering) ;
  • Jo, Jong-Bok (Mechanical and Electrical Division, Sambo Engineering) ;
  • Han, Hwataik (Department of Mechanical Engineering, Kookmin University)
  • Received : 2015.04.14
  • Accepted : 2015.06.01
  • Published : 2015.07.10
Download PDF
⟨ Previous Next ⟩

Abstract

This paper investigates the ventilation characteristics in a two-dimensional underground network junction composed of four main lines interconnected by eight ramps. Simple one-dimensional models cannot be applied to network junctions since there are interferences of traffic piston effects in the main lines and at the ramps. A numerical algorithm was developed to analyze the pressure and airflow distributions iteratively. The Darcy-Weisbach equation was used to calculate the piston effects by traffic flows, and a Hardy Cross iteration was conducted for network analysis at the interconnected junction. The results show interesting ventilation characteristics and CO concentration distributions depending on system parameters such as vehicle speed, tunnel diameter, and other junction configurations.

Keywords

References

  1. Korea Times, 2009, Seoul plans underground road network, Aug. 5, 2009.
  2. Li, J. S. M. and Chow, W. K., 2003, Numerical studies on performance evaluation of tunnel ventilation safety systems, Tunneling and Underground Space Technology, Vol. 18, pp. 435-452. https://doi.org/10.1016/S0886-7798(03)00023-3
  3. PIARC-World Road Association, 2004, PIARC technical committee on road tunnels operation (C5), Road Tunnels : Vehicle Emissions and Air Demand for Ventilation, pp. 9-41.
  4. BNTTEK Inc, 2004, Numerical analysis report on ventilation and disaster prevention in underground road of Olympic Expressway, BNTTEK Report, Korea.
  5. Kim, N. Y., 2014, Ventilation characteristics by piston effect in underground network road junctions, Ph.D. Thesis, Kookmin University, Seoul, Korea.
  6. Kwon, O. Y. and An, Y. S., 2006, Temporal and spatial distributions of PM10, NOx and $O_3$ around the road, J. KOSAE, Vol. 22, No. 4, pp. 440-450.
  7. Lee, S. C., 2013, Experiment of scale model, three-dimensional numerical simulation, resistance of ventilation, natural wind, tunnel condition, Journal of Korean Institute of Plant Engineering, Vol. 18, No. 4, pp. 41-49.
  8. Byun, S. H., Jeong, J. H. Jun, D. C., Shin, I. J., and Sim, D. H., 2011, A case study on M&E design for double-deck tunnel in urban area, Tunnel and Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 21, No. 4, pp. 281-286.

Cited by

  1. Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015 vol.28, pp.6, 2016, https://doi.org/10.6110/KJACR.2016.28.6.256