Deflagration-to-detonation transition in natural gas–air mixtures

Zipf, R. Karl; Gamezo, Vadim N.; Mohamed, Khaled; Oran, Elaine S.; Kessler, David A.

doi:10.1016/j.combustflame.2014.02.002

Cited by 40 publications

(21 citation statements)

References 16 publications

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“…These obstacles, their placement, and the test results have been described in detail by Zipf et al (2014), and they are not the subject of this article.…”

Section: Local Wildlifementioning

confidence: 97%

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Large-Scale Experiments and Absolute Detonability of Methane/Air Mixtures

Oran

Gamezo

Zipf

2014

Combustion Science and Technology

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The Gas Explosions Research Facility at Lake Lynn Experimental Mines was used to determine the detonability limit of methane for a 1-meter diameter tube as a function of the percent of methane in air. The measurements showed detonation limits of 5.3% (lean) and 15.6% (rich). A method for extrapolating these limits to larger systems, more relevant to coal mine tunnels, was proposed based on a simple scaling law and some empirical information on the number of cells required for a detonation to propagate in closed, open, and partially open geometries. The scaling law reproduces the measured detonation-cell sizes measured in the 1-m tube. Applying this to a tunnel the size of a coal mine produces a detonability limit less than the currently measured flammability limit for methane/air at atmospheric conditions, which raises interesting questions for detonation and combustion theory and suggests measurements in larger tubes.

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“…These obstacles, their placement, and the test results have been described in detail by Zipf et al (2014), and they are not the subject of this article.…”

Section: Local Wildlifementioning

confidence: 97%

“…Physical parameters of GETF are summarized in Table 1 and described in detail by Gamezo et al (2012Gamezo et al ( , 2013 and Zipf et al (2013Zipf et al ( , 2014. The main part of GETF is the 73-m long steel pipe with internal diameter 1.05 m and the wall thickness 9.5 mm.…”

Section: The Gas Explosion Text Facility (Getf)mentioning

confidence: 99%

Large-Scale Experiments and Absolute Detonability of Methane/Air Mixtures

Oran

Gamezo

Zipf

2014

Combustion Science and Technology

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“…Many researchers have studied accelerating flames in pipelines, tubes, ducts and other industrial processes (Bauwens et al, 2007;Ciccarell and Dorofeev, 2008;Di Sarli et al, 2012a;Di Sarli et al, 2012b;Di Sarli and Di Benedetto, 2011;Jr. Zipf et al, 2013;Jr. Zipf et al, 2014).…”

Section: Introductionmentioning

confidence: 96%

Flame acceleration in pipes containing bends of different angles

Zhu

Gao

Lin

et al. 2016

Journal of Loss Prevention in the Process Industries

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“…4 To prevent losses from the explosions of methaneair mixtures in underground coal mines, experimental, theoretical, and computational methods were extensively adopted by scholars to study the propagation characteristics of gas explosion. [5][6][7][8][9][10][11][12][13] Zipf et al 14 used a long tube (length, 73 m; diameter, 1.05 m) to study the deflagration-to-detonation transition of methaneair mixtures under the blockage ratios of 0.13, 0.25, and 0.50. They found that run-up length to DDT increased with the increasing of blockage ratios.…”

Section: Introductionmentioning

confidence: 99%

Effect of filling ratio on premixed methane/air explosion in an open-end pipe

Guo

Lin

Zhu

et al. 2016

International Journal of Spray and Combustion Dynamics

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The propagation characteristics of premixed methane/air explosion under different filling ratios (20%, 30%, 40%, 50%, 60%, and 100%) were studied using an experimental system. The results indicate that the peak overpressure showed a decreasing trend at the initial stage but then showed an increasing trend until reaching its maximum value under different filling ratios. As the explosion propagated to the open end, the overpressure showed a downtrend. At this point, the flame speed initially increased along the pipe but then dropped dramatically. In addition, the explosion overpressure and flame speed increased with the increase of filling ratio. However, when the filling ratio reached 50%, the explosion overpressure and flame speed tended to be stable and the increase was not obvious. These results will be of great importance in evaluating the explosive damage to equipment and human personnel working in coal mines or other chemical industries.

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Deflagration-to-detonation transition in natural gas–air mixtures

Cited by 40 publications

References 16 publications

Large-Scale Experiments and Absolute Detonability of Methane/Air Mixtures

Large-Scale Experiments and Absolute Detonability of Methane/Air Mixtures

Flame acceleration in pipes containing bends of different angles

Effect of filling ratio on premixed methane/air explosion in an open-end pipe

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