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Indexed by:期刊论文

Date of Publication:2013-09-01

Journal:Meitan Xuebao/Journal of the China Coal Society

Included Journals:EI、PKU、ISTIC、Scopus

Volume:38

Issue:SUPPL.2

Page Number:383-387

ISSN No.:02539993

Abstract:To obtain the fire retardant mechanism of gas deflagration flame in narrow channel, a numerical simulation on the dynamic propagation and quenching characteristics of gas deflagration flame with different initial flame velocities and channel gaps was conducted based on a single-step irreversible chemical reaction and EBU-Arrhenius combustion model. The simulation results indicate that the gas deflagration flame might be quenched under certain conditions that the initial flame velocity is less than 167 m/s and channel gap is less than 1.2 mm. The initial flame velocity and channel gap directly affect the quenching distance. The smaller the flame velocity or channel gap, the shorter the quenching distance, meaning that the gas deflagration flame would be easier to be quenched. Compared with the experimental data in previous literatures under the same conditions, the simulation data are in good agreement with the experiment results, but the calculation error increases with the increase of the initial flame velocity because the quenching temperature changes as a result of increasing turblence intensity.