Citation

Li A, Si J, Li X. China Saf. Sci. J. 2020; 30(8): 51-56.

Copyright

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

DOI

10.16265/j.cnki.issn1003-3033.2020.08.008

PMID

unavailable

Abstract

In order to study accuracy of numerical simulation boundary conditions and explosion venting doors' inhibitory effect on gas explosion, tests were carried out at a gas concentration of 9.5% by using independently developed large-diameter explosion pipeline device. Then, explosion propagation process was simulated with FLUENT software, and experimental data and simulation results were compared to analyze change characteristics and flameproof effect. The results show that when explosion shock wave propagates from measuring point 2 to point 3, pressure peak decay rates of test and numerical simulation are 51.40% and 51.28% respectively with a deviation rate of 0.23%, which shows that venting door can significantly attenuate explosion pressure. Temperature changes in the same law for both methods, and peak value deviations of measuring points 2 and 3 are 6. 99% and 6.43%, but explosion venting door does not control flame temperature. Through comparative study, it is found that conclusions and change laws of two methods are consistent, which confirms accuracy of mathematical model, boundary conditions and initial conditions of numerical simulation. © 2020 China Safety Science Journal

Language: zh