Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline

Zhang, Shulin; Bi, Mingshu; Yang, Mingrui; Gan, Bo; Jiang, Haipeng; Gao, Wei

doi:10.1016/j.powtec.2019.10.009

Cited by 42 publications

(4 citation statements)

References 31 publications

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“…The maximum value of P P collected at each measuring point in a single experiment is the maximum explosion pressure ( P max ), an essential parameter for evaluating the consequences of explosive gas explosion accidents. 40 Figure 4 shows the P max of CH 4 /H 2 mixtures under different equivalence ratios (Φ) and hydrogen blending ratios (λ).…”

Section: Resultsmentioning

confidence: 99%

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures

Liu,

Peng

et al. 2024

ACS Omega

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To evaluate the explosion hazard of CH4/H2 mixtures, experiments were conducted in a long and closed pipeline with a length-to-diameter ratio of 51 and built-in obstacles, and the characteristic parameters of deflagration shock waves were analyzed under different hydrogen blending ratios (0 ≤ λ ≤ 100%) and equivalence ratios (0.5 ≤ Φ ≤ 3). The results indicate that within the range of Φ = 0.8–1.2, the explosion overpressure (P P) exhibits a “two-zone” structure distribution. When 0 ≤ λ ≤ 80%, P P shows an initial increase and then a decrease in both regions, while deflagration to detonation transition (DDT) occurs in the second evolution region when λ = 100%, which is caused by the different strengths of the positive feedback mechanism coupled with flames and shock waves. The P max, (dP/dt)max, and V a show a trend of first increasing and then decreasing and monotonically increasing with the increase of the equivalence ratio and hydrogen blending ratio, respectively, and reach their maximum values at Φ = 1.0 and λ = 100%. For CH4/H2 mixtures with low hydrogen blending ratios (λ = 0 and 20%), the P max and (dP/dt)max in the fuel-lean conditions (Φ = 0.9 and 0.8) are higher than those in the fuel-rich conditions (Φ = 1.1 and 1.2), while the CH4/H2 mixtures under high hydrogen blending ratios (λ = 80 and 100%) are the opposite. Overall, the increase in H2 at a high hydrogen blending ratio and the increase in the equivalence ratio at a fuel-lean condition significantly enhance the average V a. In addition, chemical kinetics analysis found that R38 and R52 elementary reactions are the dominant elementary reactions that promote and inhibit temperature increase, respectively. Their temperature sensitivity coefficients are negatively correlated with the hydrogen blending ratio and positively correlated with the equivalence ratio. The research results provide vital information for evaluating the explosion hazards of CH4/H2 mixtures and developing safety protection measures.

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Section: Resultsmentioning

confidence: 99%

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures

Liu,

Peng

et al. 2024

ACS Omega

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“…In addition, EA accelerates the destruction of free radicals 38 and leads to the forming of alumina with cO and cOH on the EA surface. 39 The decrease of cO leads to the reduction of the chain branching reaction (for example, C 2 H 4 + cO = cCH 3 + cHCO), followed by the exothermic oxidation reaction, which weakens the whole explosion process. 33 As the chain branching reaction (cH + O 2 = cO + cOH) 40,41 and the exothermic reaction (cOH + CO = cH + CO 2 ) 41 decrease, the oxidative heat release decreases.…”

Section: Discussion and Mechanism Analysismentioning

confidence: 99%

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

Wang

Gao

Pan

et al. 2023

Sustainable Energy Fuels

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“…Relevant literature research shows that, as an important part of the surface treatment of aluminium alloy die-cast blanks, in the production process of aluminium products grinding, polishing, blasting and other processing processes, the explosion sensitivity and intensity of various types of metal aluminium dust wastes generated are significantly higher than those of organic dusts [ [1] , [2] , [3] , [4] , [5] ]. Therefore, dust combustion and explosion at the aluminium product processing site is a major safety accident hazard, must take scientific and effective dust explosion prevention and control measures to prevent the occurrence of explosive accidents, once the dust explosion prevention and control measures taken are unreasonable, it will inevitably lead to dust combustion.…”

Section: Introductionmentioning

confidence: 99%

Inhibition characteristics research of aluminum alloy polishing dust explosion through addition of ultrafine Al(OH)3 inerting agent

Lv,

Wang,

Xue

et al. 2023

Heliyon

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Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline

Cited by 42 publications

References 31 publications

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

Inhibition characteristics research of aluminum alloy polishing dust explosion through addition of ultrafine Al(OH)3 inerting agent

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Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline

Cited by 42 publications

References 31 publications

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH4/H2 Mixtures

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH4/H2 Mixtures

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

Inhibition characteristics research of aluminum alloy polishing dust explosion through addition of ultrafine Al(OH)3 inerting agent

Contact Info

Product

Resources

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Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures