Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-03-01

Journal: COMBUSTION EXPLOSION AND SHOCK WAVES

Included Journals: EI、SCIE

Volume: 49

Issue: 2

Page Number: 153-158

ISSN: 0010-5082

Key Words: aluminum silicate wool; flame speed; explosion overpressure; explosion suppression

Abstract: Problems of decreasing the flame speed resulting from pre-mixed gas explosions and attenuating explosion overpressures are discussed. A cylindrical test pipeline with an 89x4.5 mm cross section is used to study flame propagation characteristics of an acetylene-air mixture both in the empty pipeline and in the presence of aluminum silicate wool attached to the internal wall of the pipeline. Experimental results show that aluminum silicate wool, which is a kind of a fibroid porous material with a high specific surface area, decreases the increment of the outlet flame speed and attenuates drastically the explosion overpressure if the length of the porous insert exceeds the critical length.