Velocity behavior downstream of perforated plates with large blockage ratio for unstable and stable detonations

Zhang, Bo; Liu, Hong; Yan, Bingjian

doi:10.1016/j.ast.2019.01.010

Cited by 50 publications

(8 citation statements)

References 50 publications

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“…Wang et al [38] 2017 2.5 32 78.1 15. Zhang et al [34,[39][40][41][42][43][44][45][46][47][48][49][50] 2015-2019 2.5 CT:4/14/36, AC:2/4.5/7 1250 galloping detonations, spinning detonations, and stuttering detonations. Detonation limit conditions are reached through reducing the initial pressure of the combustible mixture, changing the confinement geometry and/or scale, increasing the amount of an inert diluent, changing the roughness of the confinement boundary, etc.…”

Section: Table 1 Previous Literature Of Detonation Propagation Limitsmentioning

confidence: 99%

Experimental study of detonation limits in methane-oxygen mixtures: Determining tube scale and initial pressure effects

Zhang

Liu

Yan

et al. 2020

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Section: Table 1 Previous Literature Of Detonation Propagation Limitsmentioning

confidence: 99%

Experimental study of detonation limits in methane-oxygen mixtures: Determining tube scale and initial pressure effects

Zhang

Liu

Yan

et al. 2020

Fuel

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“…This process is often referred to as deflagration‐to‐detonation transition (DDT) 12. Obstacles in the way of the flame propagation have been employed to investigate the transition from deflagration to detonation 13. Significant advances have been made over the years in the understanding of the flame acceleration and DDT processes, which have been outlined in several excellent papers 14–18.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of the Impact of Initial Turbulence on the Explosion Behavior of Methane‐Air Mixtures

Chen

2021

Chem Eng & Technol

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The experimental parameters that significantly affect the gas explosion process were determined, investigating the pressure, temperature, and velocity in the methane‐air explosion process under quiescent and turbulent conditions. Experiments and computational fluid dynamics simulations were integrated to optimize the experimental parameters and elucidate the impact of the initial turbulence on the explosion behavior of methane‐air mixtures. Good agreement was achieved between the computed results and experimental data. For a certain CH4 concentration within the explosive limit range, an initial turbulence can increase the maximum explosion pressure and the maximum rate of the pressure rise, shorten the time to reach the maximum explosion pressure and enhance the explosion strength and destructive power of CH4‐air mixtures. Turbulent flow can significantly broaden the explosive limits of CH4‐air mixtures. The ignition delay time affects the distribution of the initial turbulence and thus the extent and severity of the explosions.

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“…Pang et al [6] conducted explosive experiments in tunnels with various turning angles and obtained the distribution law of a high-temperature flow field before and after the turning. Zhang et al [7] studied the difference in the propagation velocity behavior of the detonation wave after large-scale diffraction and revealed the interaction mechanism between the diffraction wave and the detonation wave. Cheng et al [8] proposed using a nonreactive gas jet (CO 2 ) to promote the formation of the precursor shock wave and the propagation speed of the flame in the deflagration wave and studied the effects of jet pressure and its position and jet parameters on the deflagration propagation.…”

Section: Introductionmentioning

confidence: 99%

Explosion Disaster Distribution Characteristics and Outlet Open‐Close Effect of Turning Roadway

Zhang

et al. 2021

Advances in Civil Engineering

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In this study, under the open-close conditions of a roadway outlet, ANSYS/LS-DYNA was used to build models of explosions on roadways with 0° and 90° bending angles, to compare and analyze the shock wave propagation characteristics and variation laws. Combined with the damage degree classification of shock wave overpressure to human body, the destructive effect zoning of explosion in roadway under the condition of opening and closing of roadway entrance was studied. The results showed that as the bending angle increased, the peak overpressure attenuation of the shock waves became prominent, and the arrival time for the same distance increased. The closure of the roadway outlet had a distance effect on the peak overpressure of the shock waves. The explosion shock waves caused 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 was too fast and had minimal impact on the peak overpressure. In addition, the existence of the roadway closure increased the damage area and the severity of the blast wave to human body as a whole. With an increase in the bending angle, the damage range and severity decreased.

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Velocity behavior downstream of perforated plates with large blockage ratio for unstable and stable detonations

Cited by 50 publications

References 50 publications

Experimental study of detonation limits in methane-oxygen mixtures: Determining tube scale and initial pressure effects

Experimental study of detonation limits in methane-oxygen mixtures: Determining tube scale and initial pressure effects

Experimental and Numerical Study of the Impact of Initial Turbulence on the Explosion Behavior of Methane‐Air Mixtures

Explosion Disaster Distribution Characteristics and Outlet Open‐Close Effect of Turning Roadway

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