Influence of bend structure on high-temperature flow after gas explosion

Pang, Lei; Gao, Jian; Ma, Qiuju; Chen, J.C.; Meng, Qingyang; Tan, Jing; Zhang, Q.

doi:10.1016/j.expthermflusci.2013.05.001

Cited by 13 publications

(8 citation statements)

References 20 publications

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“…Additionally, the heat or temperature loss in the bend also had a great effect on the flame acceleration. Pang et al found that the bend structure has little influence on the high-temperature flow before the bend and has significant influence on the high-temperature flow after the bend (Pang et al, 2013). Xiao et al found that the heat loss to the walls in the bend has a significant influence on the combustion dynamics (Xiao et al, 2014).…”

Section: Introductionmentioning

confidence: 97%

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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Section: Introductionmentioning

confidence: 97%

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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“…The explosion hazard of the fuels mainly depends on the relative ease with which a given mixture can be detonated [11][12][13][14]. For the assessment of detonation hazards, the measurement of dynamic detonation parameters, such as velocity, overpressure, critical energy of direct detonation initiation, which provides important information for the characterization of the explosion properties and the detonation sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Detonation and deflagration characteristics of p-Xylene/gaseous hydrocarbon fuels/air mixtures

Zhang

Xiu

Chen

et al. 2015

Fuel

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“…Based on the study of the change laws of shock waves passing through porous mediums with different geometric shapes and porosity, they proposed basic ideas of optimum underground space structural design. Pang et al (2013) conducted explosive experiments in tunnels with various turning angles and obtained the distribution law of a high-temperature ow eld before and after the turning.…”

Section: Introductionmentioning

confidence: 99%

Explosion disaster distribution characteristics and outlet open-close effect of turning roadway

Zhang

et al. 2020

Preprint

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In this study, under the open-close conditions of a roadway outlet, the nonlinear dynamic analysis finite element program ANSYS/LS-DYNA was used to build models of explosions on roadways with 0˚ and 90˚ bending angles, to compare and analyse the shock wave propagation characteristics and variation laws. Moreover, the destructive effect of the explosion on the partition was analysed based on the level of damage caused to the human body by shock wave overpressure. The results show that the bending angle has an impact on the space-time distribution law of the explosion shock waves on the roadway. As the bending angle increases, the peak overpressure attenuation of the shock waves becomes prominent, and the arrival time for the same distance increases. The closure of the roadway outlet has a distance effect on the peak overpressure of the shock waves. The explosion shock waves cause the peak overpressure to rise sharply owing to the reflection and stacking effects near the closure. In the far zone of the outlet, the attenuation of the shock waves is too fast and has minimal impact on the peak overpressure. Additionally, overall, the closure of the roadway outlet increases the damage range of the explosion shock waves and the severity of their effect on the human body. With an increase in the bending angle, the damage range and severity decrease. These results can provide a reference for explosion disaster evaluation and prevention.

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Influence of bend structure on high-temperature flow after gas explosion

Cited by 13 publications

References 20 publications

Flame acceleration in pipes containing bends of different angles

Flame acceleration in pipes containing bends of different angles

Detonation and deflagration characteristics of p-Xylene/gaseous hydrocarbon fuels/air mixtures

Explosion disaster distribution characteristics and outlet open-close effect of turning roadway

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