| Title |
Analysis of Smoke Control According to Jet Fan Location in Straight Long Tunnel |
| Authors |
변주석(Ju-Suk Byun) ; 임효재(Hyo-Jae Lim) ; 강신형(Shin-Hyung Kang) ; 이진호(Jinho Lee) |
| Keywords |
장대터널 ; 제트 팬 ; 화재 ; 제연 ; 역기류 Long tunnel ; Jet fan ; Fire ; Smoke control ; Back-layering |
| Abstract |
In this study, jet fans are installed with 4 cases in the straight long tunnel; inlet-side setup, middle-side setup, outlet-side setup, and dispersion setup. A bus is selected as fired car, of which fire size is 20MW. And fired car locates at 100m, 700m, 1500m position from tunnel inlet, respectively. FLUENT, commercial finite-volume code, is used to analyze the performance. The velocity profile, CO2 concentration, temperature distribution are examined for analysis. Performance of smoke control is compared by the backlayering length. Con-sequently, inlet-side setup of jet fans is a little more efficient than other cases considering the fire occurrence frequency in tunnel. |