Research output: Contribution to journal › Article › peer-review
An experimental study and numerical simulation of horizontal flame spread over polyoxymethylene in still air. / Korobeinichev, O.; Glaznev, R.; Karpov, A. et al.
In: Fire Safety Journal, Vol. 111, 102924, 01.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - An experimental study and numerical simulation of horizontal flame spread over polyoxymethylene in still air
AU - Korobeinichev, O.
AU - Glaznev, R.
AU - Karpov, A.
AU - Shaklein, A.
AU - Shmakov, A.
AU - Paletsky, A.
AU - Trubachev, S.
AU - Hu, Y.
AU - Wang, X.
AU - Hu, W.
PY - 2020/1
Y1 - 2020/1
N2 - A comprehensive study of thermal decomposition and combustion of a horizontally placed polyoxymethylene (POM) slab was performed. The kinetic parameters of thermal degradation of POM in supposition of two parallel reactions were determined and were used for simulation of the flame spread over the POM. The following main characteristics of the POM slab's combustion were measured: the flame spread rate, the slab's mass loss rate, the width of the pyrolysis zone, the flame height, the temperature profile of the upper and lower surfaces of the slab, the temperature field and the fields of the main flame species concentrations over the burning slab, and the conductive heat flux from the flame onto the fuel surface. It was concluded from analysis of experimental data that two global gas phase reactions may be identified: the reaction of formaldehyde pyrolysis with light combustible gas formed (with the properties close to those of СО) and the subsequent reaction of its oxidation in the flame to the end combustion products (СО2+H2O). This approach was implemented as the coupled combustion model was modified, taking into account a two-step reaction in the gas phase. The results of the calculations made showed good agreement with the experimental data.
AB - A comprehensive study of thermal decomposition and combustion of a horizontally placed polyoxymethylene (POM) slab was performed. The kinetic parameters of thermal degradation of POM in supposition of two parallel reactions were determined and were used for simulation of the flame spread over the POM. The following main characteristics of the POM slab's combustion were measured: the flame spread rate, the slab's mass loss rate, the width of the pyrolysis zone, the flame height, the temperature profile of the upper and lower surfaces of the slab, the temperature field and the fields of the main flame species concentrations over the burning slab, and the conductive heat flux from the flame onto the fuel surface. It was concluded from analysis of experimental data that two global gas phase reactions may be identified: the reaction of formaldehyde pyrolysis with light combustible gas formed (with the properties close to those of СО) and the subsequent reaction of its oxidation in the flame to the end combustion products (СО2+H2O). This approach was implemented as the coupled combustion model was modified, taking into account a two-step reaction in the gas phase. The results of the calculations made showed good agreement with the experimental data.
KW - Flame spread
KW - Flame structure
KW - Flammability
KW - Heat fluxes
KW - Micro thermocouple
KW - Numerical simulation
KW - Polymer
KW - Polymer pyrolysis kinetics
KW - Polyoxymethylene
KW - Probing mass spectrometry
KW - PMMA SURFACE
KW - COMBUSTION
KW - MECHANISM
KW - PRESSURE
KW - BURNING SURFACE-TEMPERATURE
KW - KINETICS
KW - NITROGEN
KW - DEGRADATION
KW - FORMALDEHYDE
KW - EXTINCTION
UR - http://www.scopus.com/inward/record.url?scp=85076717119&partnerID=8YFLogxK
U2 - 10.1016/j.firesaf.2019.102924
DO - 10.1016/j.firesaf.2019.102924
M3 - Article
AN - SCOPUS:85076717119
VL - 111
JO - Fire Safety Journal
JF - Fire Safety Journal
SN - 0379-7112
M1 - 102924
ER -
ID: 22992157