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http://dx.doi.org/10.6110/KJACR.2015.27.7.337

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

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)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.27, no.7, 2015 , pp. 337-343 More about this Journal
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
Tunnel ventilation; Underground road; Piston effect; Junction; Ventilation characteristics;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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