| Title |
Ventilation Analysis according to Jet Fan Location in Long Tunnel |
| Authors |
강신형(Shin-Hyung Kang) ; 변주석(Ju-Suk Byun) ; 이진호(Jinho Lee) |
| Keywords |
장대터널 ; 환기 ; 일산화탄소 ; 제트 팬 Long tunnel ; Ventilation ; Mono-dioxide carbon ; Jet fan |
| Abstract |
This paper studies the ventilation characteristics according to the jet fan location at the long road tunnel using the CFD software ‘FLUENT’ which is based on the finite volume method. The tunnel model used in the analysis has a length of 1600m, a cross sectional area of 120m3, and is composed of 3 lanes and one way. The velocity profile, the distribution of CO concentration and the ventilation flow rate within the tunnel are analyzed, respectively. In the analysis, it is found that the dependence of the ventilation flow rate upon the jet fan location is small, but the CO concentration in the tunnel is at the lowest when the jet fans are installed near the tunnel outlet. An air stream right below the jet fan is almost inactive due to the strong stream injection near the jet fan. Thus, the pollution level below the jet fan must be higher than the other area. |