Experimental Study on the Dynamic Strain of a Thin-Walled Pipe in the Gas Cloud Explosion with Ignition Energy
- 4 Downloads
This paper describes an experimental study of the flame propagation mechanism for the combustible gas explosion in a closed pipe with a length of 12 m and an internal diameter of 0.125 m, which is carried out for different values of the ignition energy. The results show that an increase in the ignition energy results in greater explosive intensity, maximum peak pressure, and dynamic strain of the thin wall in the whole process. Moreover, the dynamic strain of the thin-walled pipe increases suddenly owing to arrival of a precursor shock wave and then vibrates for a long time, which is induced by the wave reflected back and forth. In addition, there is good agreement between the dynamic strain signals and pressure wave signals. These research results can provide a theoretical basis for industrial explosion accident assessments as well as explosion and shock resistance designs, which provides guidance not only for industrial safety, but also for prevention and mitigation of explosion accidents.
Keywordsdetonation pipe gas cloud explosion ignition energy peak pressure dynamic strain
Unable to display preview. Download preview PDF.
- 1.L. Bernard and G. V. Elbe, Combustion, Flame, and Explosions of Gases (Academic Press, New York, 1961).Google Scholar
- 2.W. R. Chapman and R. V. Wheeler, “The Propagation of Flame in Mixtures of Methane and Air. Part IV: The Effect of Restrictions in the Path of the Flame Travels,” J. Chem. Soc. 12 (4), 309–312 (1927).Google Scholar
- 8.A. A. Vasil’ev and V. A. Vasiliev, “Initiation of Multifuel Mixtures with Bifurcation Structures,” Fiz. Goreniya Vzryva 52 (6), 3–12 (2016) [Combust., Expl., Shock Waves 52 (6), 621–630 (2016)].Google Scholar
- 13.K. Y. Zhou and Z. F. Li, “Flame Front Acceleration of Propane-Air Deflagration in Straight Tubes,” Expl. Shock Wave 2 137–142 (2000).Google Scholar
- 14.J. Lu, J. G. Ning, C. Wang, and B. Q. Lin, “Study on Flame Propagation and Acceleration Mechanism of City Coal Gas,” Expl. Shock Wave 24 (4), 305–311 (2004). [in Chinese].Google Scholar
- 16.V. A. Arkhipov, V. E. Zarko, I. K. Zharova, et al., “Solid Propellant Combustion in a High-Velocity Cross-Flow of Gases (Review),” Fiz. Goreniya Vzryva 52 (5), 3–22 (2016) [Combust., Expl., ShockWaves 52 (5), 497–513 (2016)].Google Scholar
- 18.A. Yu. Krainov and K. M. Moiseeva, “Combustion Modes of Lean Methane–Air Mixtures in a U-Shaped Burner,” Vest. Tomsk. Gos. Univ., Mat. Mekh. 2 (28), 69–76 (2014).Google Scholar