PMID: 11924866Apr 2, 2002Paper

Measurement and three-dimensional modeling of airflow and pollutant dispersion in an undersea traffic tunnel

Journal of the Air & Waste Management Association
K S ChenS W Wang

Abstract

Airflow and pollutant dispersion in a cross-harbor traffic tunnel were experimentally and numerically studied. Concentrations of the gaseous pollutants CO, NOx, and total hydrocarbons (THC) at three axial locations in the tunnel, together with traffic flow rate, traffic speed, and types of vehicle were measured. Three-dimensional (3D) turbulent flow and dispersion of air pollutants in the tunnel were modeled and solved numerically using the finite volume method. Traffic emissions were modeled accordingly as banded line sources along the tunnel floor. The results reveal that cross-sectional concentrations are nonuniformly distributed and that concentrations rise with downstream distance. The piston effect of vehicles alone can provide 9-23% dilution of air pollutants in the tunnel, compounded to a 23-74% dilution effect according to the ventilation condition.

References

Jun 1, 1973·Journal of the Air Pollution Control Association·W B JohnsonR J Allen

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Citations

Oct 24, 2006·Environmental Monitoring and Assessment·Chung-Yi Chung, Pei-Ling Chung
Aug 28, 2016·Environmental Pollution·Utkarsh Bhautmage, Sharad Gokhale
Mar 31, 2005·Journal of Environmental Monitoring : JEM·Oddny Indrehus, Tor Tybring Aralt

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