Numerical and analytical prediction of pressure and impulse from vented gas explosion in large cylindrical tanks

Li, Jingde; Hao, Hong

doi:10.1016/j.psep.2019.05.019

Cited by 40 publications

(3 citation statements)

References 33 publications

(43 reference statements)

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“…e fan is the heart of the mine, providing fresh air for the mine, excluding contaminated air, reducing the occurrence of gas explosions, coal dust explosions, and other disasters, and playing a pivotal role in the safe construction of the mine [18,19]. At present, many experts in related fields have conducted much research in the process of gas explosion shock wave propagation and already have a lot of theoretical knowledge; for example, Li et al studied the explosion pressure and impact generated by large explosions through numerical simulation [20]; Ye et al conducted theoretical and experimental research on the propagation law of flame and shock wave in the bend [21]; Song revealed the invented new dynamic response characteristics and laws of the explosion door of the vertical wind shaft during the explosion impact [22].…”

Section: Mine Fansmentioning

confidence: 99%

Damages of Underground Facilities in Coal Mines due to Gas Explosion Shock Waves: An Overview

Ran

Cheng

Zhang

et al. 2021

Shock and Vibration

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With coal mining depth increase, gas explosion accidents due to the high gas emission rates often occur which cause significant casualties and property damages. Among them, gas explosion shock waves not only can destroy the machines and equipment in mine roadways but also cause the failure of mine ventilation facilities resulting in secondary hazards. Thus, the mines’ serious disasters could happen. For many years, researchers have already done a great lot of works to study damages caused by the impact of shock waves of the gas explosions in underground mines. Research results provide a baseline for judgments of hazard effects by explosions. In this paper, the formation mechanism of the gas explosion shock wave is introduced firstly. Then, the damages for underground facilities, such as mechanical equipment, roadway, and life-saving devices are summarized and reviewed. Finally, a brief discussion about the methods is given, and some preliminary suggestions are also listed for improvements in the future.

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Section: Mine Fansmentioning

confidence: 99%

Damages of Underground Facilities in Coal Mines due to Gas Explosion Shock Waves: An Overview

Ran

Cheng

Zhang

et al. 2021

Shock and Vibration

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“…Dadashzadeh et al (2014) proposed a new method to quantify the risk of combustion products dispersion phenomenon in a confined or semi-confined facility. Li and Hao (2019) investigated the explosion pressure and impulse from large-scale explosions by using experiments and FLACS.…”

Section: Introductionmentioning

confidence: 99%

Towards limiting potential domino effects from single flammable substance release in chemical complexes by risk-based shut down of critical nearby process units

Sun

Wang

Yang

et al. 2021

Process Safety and Environmental Protection

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The explosion load is a significant escalation factor possibly influencing the potential occurrence of domino accidents in chemical plants. It is not economical to install explosion isolation systems (e.g., extinguishing barrier) for all equipment or process units across a chemical plant. Although shutting down all equipment or process unit can prevent an explosion, it may also cause further economic losses. To prevent domino accidents, the process unit that needs to be shut down accurately should be selected, and the normal operation of other units needs to be ensured. A method to select the process unit to be isolated based on the Dimensioning Accidental Load (DAL) is proposed. By calculating the occurrence probability and consequences of the accident scenarios, the DAL of the surrounding units is determined. DAL is used as the impact intensity of the accident unit on the surrounding units. The probit model is used to calculate the damage probability of surrounding units. The case analysis results show that the method of selecting the process unit to be isolated based on DAL quantifies the impact intensity of the exploded unit on surrounding units from probability and consequence. Under the premise of meeting the acceptable risk criteria, the method can determine which units should be shut down and which units can operate normally when a release accident occurs. While preventing domino accidents, economic losses caused by the shutdown of all process units are reduced and a theoretical basis for accident prevention and safe operation of the plant is provided.

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“…Some scholars studied the influences of pipe length, pipe diameter, and space distance on gas explosion overpressure [19][20][21]. Li and Hao simulated the ignition and propagation characteristics of gas explosions by introducing basic chemical reactions [22]. Some scholars studied the propagation law of gas explosion shock waves in roadways with different turning angles and on bifurcated roadways [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Influence of Roadway Cross‐Section Shape on Gas Explosion Shock Wave Law in U‐Type Ventilation Working Faces

Liu

Shen

Chen

et al. 2021

Shock and Vibration

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In U-shaped ventilation working face, different tunnel section shapes are one of the important factors affecting the propagation of gas explosion shock wave. In order to study the propagation law of gas explosion shock wave in working face, the numerical simulation study was carried out by using Fluent simulation software combined with the actual situation of gas explosion in #415 working face of Chenjiashan Coal Mine in Shaanxi Province. By constructing a three-dimensional mathematical and physical model, a simulation study of the upper-corner gas explosion was carried out. The results are described as follows. (1) After the gas explosion shock wave propagates 40 m, the overpressure peak equidistant difference tends to be stable and attenuates and propagates in the form of a single shock wave. The study determines that the effective length of the U-shaped ventilation inlet/return tunnel is 40 m. (2) When the tunnel section is trapezoidal, the initial overpressure of the gas explosion shock wave propagating to the inlet/return airway is the highest, followed by rectangular and semicircular arches, but the internal overpressure attenuation trend of different cross-sectional shapes is the same. (3) The gas explosion shock wave propagates radially along the working face section during the working face propagation. The farther away the location is from the upper corner of the tunnel during a gas explosion with different cross-sectional shapes, the closer the cutoff overpressure peak is. The attenuation trend of overpressure with the propagation distance conforms to the power function law. The research results provide an important theoretical direction for the numerical simulation of gas explosions in coal mining faces.

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Numerical and analytical prediction of pressure and impulse from vented gas explosion in large cylindrical tanks

Cited by 40 publications

References 33 publications

Damages of Underground Facilities in Coal Mines due to Gas Explosion Shock Waves: An Overview

Damages of Underground Facilities in Coal Mines due to Gas Explosion Shock Waves: An Overview

Towards limiting potential domino effects from single flammable substance release in chemical complexes by risk-based shut down of critical nearby process units

Influence of Roadway Cross‐Section Shape on Gas Explosion Shock Wave Law in U‐Type Ventilation Working Faces

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