Citation

Duan Y, Bu Y, Long F, Li Y, Huang J, Yu S. China Saf. Sci. J. 2022; 32(10): 83-89.

Copyright

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

DOI

10.16265/j.cnki.issn1003-3033.2022.10.1861

PMID

unavailable

Abstract

In order to further explore the synergistic explosion suppression effect among various explosion suppression technologies, the methane explosion characteristics under the combined action of no pressure (0 MPa), low pressure (0. 1, 0. 2 MPa) nitrogen⁃water mist and different elastic coefficients (0. 42, 0. 81 N/ mm) limit slip devices were carried out on a self⁃built 100 mm×100 mm×1 000 mm square pipeline explosion platform. The results show that the development of the " tulip"⁃shaped flame structure is hindered by the coupling effect of the nitrogen⁃containing water mist and the sliding device, the sliding device makes the combustion zone form a variable⁃capacity restricted space, its volume is proportional to the flame propagation speed, the explosion overpressure in each working condition decayed, and the decay rate of the burned area was slightly greater than that of the unburned area. Under the action of 0. 1 MPa nitrogen⁃water mist under the two elastic coefficients, the overpressure peak in the burned area decreased by 12. 92% and 16. 07%, respectively, and the overpressure peak in the unburned area decreased by 11. 97% and 15. 12%, respectively. © 2022 China Safety Science Journal. All rights reserved.

Language: zh