A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Vertical flame spread with horizontal projection
Master Thesis in Fire Safety Engineering Western Norway University of Applied Sciences ; This report consists of two main parts. The first part focuses on the results from several small-scale experiments. A vertical and combustible wall was exposed to external venting flames from a lower compartment. A non-combustible horizontal projection was used to reduce the direct impingement of the venting plume on the wall. The wall consisted of particle board and the horizontal projection was made of calcium silicate. The effectiveness of the horizontal projection in preventing vertical fire spread along the wall was studied for six different heat-release rates (33, 37, 42, 47, 51 and 56 kW). The study investigated how different projection sizes impacted flame height, ignition, vertical temperature development, and char formation. In this study, 0.075 m and 0.1 m projections were used principally, while other projections (0.05 m and 0.2 m) were used for specific cases. The 0.1 m projection was more effective in reducing vertical flame heights and temperature development compared with the 0.075 m projection. The 0.1 m projection successfully prevented ignition on wall at 33 kW and 37 kW fires during the 10 min experimental duration, while the 0.075 m projection prevented ignition at 33 kW fire only. However, at higher heat-release rates, the wall ignited with both projections. Once ignition occurred, flame spread across the wall surface due to the combined effect of the burner and combustible gases from the pyrolysis process. The flame spread decreased after char formation on the wall. Char area and depth increased with higher heat-release rates for both projections, although there were no significant changes in vertical char height. A longer projection (0.2 m) was more effective by preventing ignition against 47 kW fire. The longer deflection distance restricted continuous attachment of flames and heat transfer to the wall. The second part of this study involves a computational simulation study. A three-storey building ...
Vertical flame spread with horizontal projection
Master Thesis in Fire Safety Engineering Western Norway University of Applied Sciences ; This report consists of two main parts. The first part focuses on the results from several small-scale experiments. A vertical and combustible wall was exposed to external venting flames from a lower compartment. A non-combustible horizontal projection was used to reduce the direct impingement of the venting plume on the wall. The wall consisted of particle board and the horizontal projection was made of calcium silicate. The effectiveness of the horizontal projection in preventing vertical fire spread along the wall was studied for six different heat-release rates (33, 37, 42, 47, 51 and 56 kW). The study investigated how different projection sizes impacted flame height, ignition, vertical temperature development, and char formation. In this study, 0.075 m and 0.1 m projections were used principally, while other projections (0.05 m and 0.2 m) were used for specific cases. The 0.1 m projection was more effective in reducing vertical flame heights and temperature development compared with the 0.075 m projection. The 0.1 m projection successfully prevented ignition on wall at 33 kW and 37 kW fires during the 10 min experimental duration, while the 0.075 m projection prevented ignition at 33 kW fire only. However, at higher heat-release rates, the wall ignited with both projections. Once ignition occurred, flame spread across the wall surface due to the combined effect of the burner and combustible gases from the pyrolysis process. The flame spread decreased after char formation on the wall. Char area and depth increased with higher heat-release rates for both projections, although there were no significant changes in vertical char height. A longer projection (0.2 m) was more effective by preventing ignition against 47 kW fire. The longer deflection distance restricted continuous attachment of flames and heat transfer to the wall. The second part of this study involves a computational simulation study. A three-storey building ...
Vertical flame spread with horizontal projection
Kanok, MD Faisal Rashid (author)
2024-01-01
Theses
Electronic Resource
English
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