چکیده مقاله
In most fire accidents inside road tunnels, the fire starts from one or two cars and is then spread to other cars after sometime The flame length is the most important parameter for controlling the spread of fire from the fire source to the nearbytrucks, therefore, knowledge of flame length and behavior is the most important challenge in controlling the fireconsequences In the previous studies, fire is arbitrarily assumed at the center of the tunnel and some specific equations aredeveloped for those cases, however, in real conditions, the fire mostly takes place near the walls of the tunnel and the nearwall fire is very different from the central fires in a tunnel In this study, analytical analyses and computational fluiddynamics simulation were performed through FDS software, to determine the length of the flame near the tunnel wall Inaddition, support vector machines and fuzzy clustering model were used to develop a code to obtain better data from theFDS software The results of empirical analyses indicate that in cases of near wall fires, the fire flame is longer compared tothe cases where the fire occurs at the center of the tunnel In a Fire with the power of 130 kW, the ratio of flame length nearthe wall to the flame length at the center of the tunnel was equal to 1 74 The results of CFD simulations, with wood as thefuel source, indicate that any rise of fire heat leads to decreasing ratio of flame length in near wall fires to the flame lengthat the center of tunnel until this ratio reaches unity
کلیدواژهها
نویسندگان
behzad Niknam
MSc mining engineering Amirkabir University
شیوه ارجاع
Niknam, behzad,1398,Numerical and analytical prediction of near tunnel wall fire flame length,The 13th Iran Tunnel Conference,Tehran
ارائهشده در
مجموعه مقالات سیزدهمین کنفرانس تونل ایران28 آبان 1398 · تهران