Citation

Yu Y, Liu L, Zhang J, Ji N, Meng X, Zhou T. China Saf. Sci. J. 2022; 32(10): 100-106.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.10.0138

PMID

unavailable

Abstract

In order to study the explosion suppression performance of NSSs and MAAs on propane in closed space. NSSs and MAAs with a density of 45. 1 kg / m3 were filled in a CVCB, and the explosion test was carried out after premixed propane⁃air. Explosion suppression effect and contrast of NSSs and MAAs were analyzed and compared including overpressure, the maximum explosion overpressure time and the maximum explosion overpressure reduction rate. The average propagation velocity of the filled flame front was calculated and compared by flame schlieren image. the The turbulent combustion phenomenon was analyzed and the explosion suppression performance under different equivalence ratios was compared. The results showed that the effects on explosion suppression of NSSs was better than that of MAAs. With the increase of equivalence ratio, the maximum explosion overpressure reduction rate of NSSs and MAAs first decreased and then increased, and the average flame velocity of NSSs and MAAs first increased and then decreased. The suppression effect was lower under the equivalence ratio of 1 than that of another equivalence ratios (0. 8, 1. 2, 1. 5 and 2. 0). As a result, with the concentration of propane increasing, suppression effect increased. © 2022 China Safety Science Journal. All rights reserved.

Language: zh