Comparative study on standardized ignition sources used for explosion testing

Spitzer, Stefan H.; Askar, Enis; Krietsch, Arne; Schröder, V.

doi:10.1016/j.jlp.2021.104516

Cited by 15 publications

(7 citation statements)

References 3 publications

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“…Enis [ 32 ] determined the influence of strong ignition sources on explosion and decomposition. The results of these other studies point to the same conclusion: the higher the ignition energy intensity, the larger the heating area, and the longer the action time [ 33 ]. The wider the explosion limit range, the more mature the mechanism of flame-induced gas explosion [ 34 ].…”

Section: Introductionmentioning

confidence: 67%

Propagation laws of discontinuous gas supply in the excavation roadway

Gao

Shi

et al. 2022

PLoS ONE

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An explosion with a discontinuous gas supply (DGS-explosion) is more complicated than a common secondary explosion. We present the results of a study on the propagation laws of the DGS-explosion induced by a gas explosion in excavation roadways. A rectangular tube was established using ANSYS, similar to an excavation roadway in an underground coal mine. The gas, flame, and shock wave propagation laws were determined by analyzing the explosive gas as it exited the excavation roadway. The results show that the initial explosion caused the flame generated in the DGS-explosion to be significantly stretched. Moreover, the shock wave was reflected by the end of the tube, which resulted in the reverse migration of the local gas after the DGS-explosion. Meanwhile, with the increase in local gas concentrations, the pressure peak and the entire explosion system can increase after the DGS-explosion. The flame region, temperature peak, and flame irregularity in the tube positively correlate with the concentration. These results can provide theoretical support and an experimental basis for preventing and responding to accidents caused by gas explosion accidents.

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Section: Introductionmentioning

confidence: 67%

Propagation laws of discontinuous gas supply in the excavation roadway

Gao

Shi

et al. 2022

PLoS ONE

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“…The particles in this cloud are ignited, while the remaining particles are ignited by the propagation of the flame in the sphere. [16] The thermal analysis was performed on a METTLER TOLEDO TGA-DSC2 in air atmosphere and a temperature range of 25 to 750 °C, with a temperature rise of 20 °C/min. The paprika powder samples at a weight of about 10 mg were placed in a corundum ceramic crucible.…”

Section: Resultsmentioning

confidence: 99%

Study on the Safety Characteristics of Different Types of Pepper (Capsicum L.)

Kosár,

Szabová,

Kuracina

et al. 2024

Preprint

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The research was aimed at comparing the fire characteristics of different types of pepper in the context of designing explosion prevention. The following characteristics were studied: explosion pressure pmax and Kst at selected concentrations, ignition temperature of the deposited dust layer from the hot surface and minimum initiation energy. The comparison of the chemical properties of the used types of pepper was performed using TG/DSC. Results of the measurements suggest that different types of peppers exhibit different explosion characteristics. Each of the samples reached the maximum value of the explosion pressure, and their rate of pressure rise increased at different concentrations. The volume of the explosion chamber used also influenced the explosion characteristics. It is a consequence of the fact that the explosion characteristics strongly depend on the mechanism of action of a particular igniter. The minimum effect on the safety characteristics was observed when measuring the minimum initiation energy and the minimum ignition temperature of dust layer from the hot surface. The results of the measurements suggest that different types of peppers exhibit different explosion characteristics. This information should then be considered in explosion prevention.

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“…Lv et al 32 explore the relationship between flame propagation velocity, explosion overpressure, flame thickness, and distance from an ignition source in the nonadiabatic open-ended steel pipe. Spitzer et al 33 discuss the effect of four different ignition sources on gas explosions.…”

Section: Introductionmentioning

confidence: 99%

“…Lv et al 32 velocity, explosion overpressure, flame thickness, and distance from an ignition source in the nonadiabatic open-ended steel pipe. Spitzer et al 33 discuss the effect of four different ignition sources on gas explosions. To sum up, there is relatively little research on the continuous variation of environmental parameters after gas explosions and the response characteristics of ignition energy to them.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ignition Energy on Environmental Parameters of Gas Explosion in Semiclosed Pipeline

Qiao

Min

et al. 2022

ACS Omega

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In the processes of chemical production, storage, transportation, and utilization, when a gas explosion occurs, the postexplosion environmental parameters (environmental pressure, environmental temperature, and environmental humidity) are significant prerequisites for inducing secondary explosions and other derivative disasters. To investigate the variation and explore the influence of the law of ignition energy on gas explosions, experiments in a semiclosed pipeline under different ignition energies were performed. The results showed that there appeared a relatively obvious air backflow phenomenon at the opening end of the pipeline after gas explosions. The response relationship between the environmental pressure peak and ignition energy fit better with the linear function. Ignition energy had a comparatively large impact on environmental temperature. More specifically, when the ignition power was 275 W, the beginning moment of rise of the temperature was the earliest, the pressure rise rate was the fastest, the temperature peak was the highest, and the temperature rise range after explosions was the largest, respectively, 3.05 s, 14.3 °C/s, 32.8 °C, and 8.66%. However, there was no strong causal relationship between ignition energy and environmental humidity. The research contributes to understanding the changing tendencies of environmental parameters during the whole process of gas explosions and analyzes the effect law of ignition energy on environmental parameters. Meanwhile, it can provide support to prevent and weaken secondary explosions and other derivative disasters and improve the safety production capacity of the chemical industry.

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Comparative study on standardized ignition sources used for explosion testing

Cited by 15 publications

References 3 publications

Propagation laws of discontinuous gas supply in the excavation roadway

Propagation laws of discontinuous gas supply in the excavation roadway

Study on the Safety Characteristics of Different Types of Pepper (Capsicum L.)

Effect of Ignition Energy on Environmental Parameters of Gas Explosion in Semiclosed Pipeline

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