TY - JOUR
T1 - Explosions in buildings
T2 - modeling and interpretation of real accidents
AU - Molkov, V. V.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - Real explosions in domestic structures (Rasbash and Stretch, Struct. Eng 1969;47;403-11) and industrial plants (Howard, Loss Prevention 1972;6;68-73) have been analyzed. Deflagration dynamics are solved for enclosures of volumes of 130-8000 m3 for vent release overpressures in the range of 0-0.21 bar, and for different inertia of covers over the venting spaces in the range 0-15 kg/m2. From comparisons of the real explosion data with the modeling of pressure-time behavior during vented gaseous deflagrations according to an earlier lumped parameter theory values of the main parameter, a turbulence factor, χ, are obtained. The results suggest the combustion is highly turbulent for real conditions in domestic structures (turbulence factor χ ≥ 8 with discharge coefficient μ = 0.6) and especially in large-scale enclosures such as a plant, with internal obstacles (turbulence factor χ ≥ 17). On the basis of the devised effective turbulence factors (the ratio χ/μ) the design procedures for avoiding the development of excessive overpressures during deflagrations, in both domestic and industrial plant, can be improved.
AB - Real explosions in domestic structures (Rasbash and Stretch, Struct. Eng 1969;47;403-11) and industrial plants (Howard, Loss Prevention 1972;6;68-73) have been analyzed. Deflagration dynamics are solved for enclosures of volumes of 130-8000 m3 for vent release overpressures in the range of 0-0.21 bar, and for different inertia of covers over the venting spaces in the range 0-15 kg/m2. From comparisons of the real explosion data with the modeling of pressure-time behavior during vented gaseous deflagrations according to an earlier lumped parameter theory values of the main parameter, a turbulence factor, χ, are obtained. The results suggest the combustion is highly turbulent for real conditions in domestic structures (turbulence factor χ ≥ 8 with discharge coefficient μ = 0.6) and especially in large-scale enclosures such as a plant, with internal obstacles (turbulence factor χ ≥ 17). On the basis of the devised effective turbulence factors (the ratio χ/μ) the design procedures for avoiding the development of excessive overpressures during deflagrations, in both domestic and industrial plant, can be improved.
UR - http://www.scopus.com/inward/record.url?scp=0032644914&partnerID=8YFLogxK
U2 - 10.1016/S0379-7112(99)00003-X
DO - 10.1016/S0379-7112(99)00003-X
M3 - Article
AN - SCOPUS:0032644914
SN - 0379-7112
VL - 33
SP - 45
EP - 56
JO - Fire Safety Journal
JF - Fire Safety Journal
IS - 1
ER -