NUMERICAL INVESTIGATION FOR SMOKE SPREAD IN UNDERGROUND TUNNELS
Ahmad Emad El-din Mohamed Hamdy;
Abstract
The present work is a numerical simulation for smoke control in underground tunnels,
simulation cases investigation aims to study the Smoke propagation, Toxic gases,
Temperature and Visibility For these purposes, various simulations were performed in Al-
Azhar road tunnel having: 2.4 km length; curved cross section with a width of 8 m and height
of 6.5 m; two lanes (each of them used only for one traffic direction);. The tunnel investigated
was equipped with a longitudinal ventilation system .
Three different burning vehicles (Single car, Four Cars, and a bus), placed in the center of the
driving lane. Peaks of the heat release rate were assumed to be: 5, 20 and 30 MW for the
Single car, Four Cars, and a bus, respectively, simulated as a fire with an unsteady heat
release rate resulted from burning Heptane as a fuel at jet fan velocity of 22, 26 m/sec. In this
investigation, Fire Dynamics Simulator (FDS) software version 5.5.3 is utilized to simulate
six case studies in 80 m long, 8 m wide and 6.5 m height domain with a different fire source
(single passenger car, four cars and Bus)
simulation cases investigation aims to study the Smoke propagation, Toxic gases,
Temperature and Visibility For these purposes, various simulations were performed in Al-
Azhar road tunnel having: 2.4 km length; curved cross section with a width of 8 m and height
of 6.5 m; two lanes (each of them used only for one traffic direction);. The tunnel investigated
was equipped with a longitudinal ventilation system .
Three different burning vehicles (Single car, Four Cars, and a bus), placed in the center of the
driving lane. Peaks of the heat release rate were assumed to be: 5, 20 and 30 MW for the
Single car, Four Cars, and a bus, respectively, simulated as a fire with an unsteady heat
release rate resulted from burning Heptane as a fuel at jet fan velocity of 22, 26 m/sec. In this
investigation, Fire Dynamics Simulator (FDS) software version 5.5.3 is utilized to simulate
six case studies in 80 m long, 8 m wide and 6.5 m height domain with a different fire source
(single passenger car, four cars and Bus)
Other data
| Title | NUMERICAL INVESTIGATION FOR SMOKE SPREAD IN UNDERGROUND TUNNELS | Other Titles | دراسة عددية للتحكم فى أدخنة الحرائق داخل الانفاق تحت الأرض | Authors | Ahmad Emad El-din Mohamed Hamdy | Issue Date | 2018 |
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