Citation

Huang Q, Mu C, Zhou H, Li Z, Shi B, Wang J. China Saf. Sci. J. 2020; 30(3): 102-108.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.03.016

PMID

unavailable

Abstract

In order to explore a method for explosion suppression after gas leakage into chamber structure, a large-scale round tube explosion test system, 200 mm wide and 17500 mm long with a 500 mm×500 mm×200 mm (length×width×height) cavity, was built. Then, explosion suppression effect of gas-containing cavity and its ABC dry powder was tested. And explosion propagation characteristics in the above-mentioned cavity was analyzed with numerical simulation. The results show that while gas-free cavity structure has a better suppression effect on gas explosion, gas-containing cavity structure is the opposite, and explosion flame and shock wave peak overpressure in the back of it increase by 1.68 and 1.45 times respectively compared to its front. When mass of ABC dry powder in gas-containing cavity structure is 400 g and 300 g, explosion flame and shock wave peak overpressure in its back change from increase to decrease compared to its front. When dry power is 600 g, suppression rates of flame and shock wave are increase by 108.4% and 77.46% respectively compared to those without ABC dry powder. © 2020 China Safety Science Journal. All rights reserved.

Language: zh