Experimental and Numerical Studies of Pressure and Gap Length Effects on Energy Deposition in Spark Discharge

Корытченко, К. В.; Varshamova, I. S.; Meshkov, Denys V.; Dubinin, Dmytro; Kovalenko, R.I.; Nazarenko, Sergii

doi:10.46813/2021-131-092

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…According to the results of these studies, a decrease in the critical detonation initiation energy was found with increasing initial gas pressure. In works [5,6], a numerical study of the influence of the initial pressure of inert gas on the development of a spark discharge was carried out, where the influence of pressure on the efficiency of energy input into the spark discharge was revealed. At the same time, studies of processes that occur during spark initiation of detonation under different pressures of a hydrogenoxygen gas mixture were not conducted.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Detonation Initiation by Spark Discharge in a Hydrogen-Oxygen High-Pressure Gas Mixture

Корытченко¹,

Martynenko²,

Kasimov³

et al. 2023

Problems of Atomic Science and Technology

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The influence of the initial pressure of the combustible gas mixture on the processes that occur during the initiation of detonation by a spark discharge in a high-pressure hydrogen-oxygen mixture was estimated. A onedimensional gas-dynamic model in a chemically reacting gas with separation of the vibrational temperature of diatomic molecules from the kinetic temperature of the gas was used for the numerical study. It was simulated that an intensity of the shock wave causing the detonation initiation by a critical regime is below of the detonation wave intensity when the initial gas pressure is 1.013 MPa and the intensity of the shock wave exceeds the detonation wave intensity when the initial gas pressure is 0.304 MPa. It was found out that the process of the detonation initiation falling by a near-critical regime is more longitudinal when the gas pressure is low. Energy deposition history into the spark channel when detonation is initiated at different initial gas pressures was calculated.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Detonation Initiation by Spark Discharge in a Hydrogen-Oxygen High-Pressure Gas Mixture

Корытченко¹,

Martynenko²,

Kasimov³

et al. 2023

Problems of Atomic Science and Technology

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Comparing of the characteristics of thermal spray coating technologies: air-fuel detonation aluminum spraying onto steel with other technologies

2023

Funct.Mater.

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Effective ignition energy for capacitor short-circuit discharge in explosive environments

Dangshu,

Likang,

Liu

et al. 2024

Front. Phys.

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Capacitors short-circuit discharge in an explosive environment can ignite and detonate the surrounding explosive media, causing dangerous accidents. At low voltages, this kind of discharge constitutes a micro-nano discharge; because the discharge gaps here are of the order of only microns to nanometers, the discharge process, electrode energy consumption, explosive media ignition energy, and other energy relationships are unclear. To study the relationships between the capacitor storage energy and various kinds of dissipation energies under short-circuit discharge, a model comprising conical and spherical cylinder microbumps is proposed based on the cathode surface morphology obtained by three-dimensional profiling and scanning electron microscopy, respectively. Then, the second-order non-chi-squared differential equations were established based on the principle of energy conservation and heat balance to deduce the relationships between the cathode surface temperature and height of the microbump, conical angle, and spherical radius; further, the energy consumed by the anode surface is calculated based on the theory of heat transfer. Using heat conduction theory, the energy consumed by the microbumps on the cathode surface is calculated, and the energy consumed on the anode surface is deduced using the surface heat source as the loading heat source. The residual energy of the capacitor is calculated from the discharge time and voltages before and after discharge, and the effective energy of the gas is calculated using the law of conservation of energy. Finally, the discharge channel energy, electrode energy consumption, and end residual energy of the discharge capacitor are used to derive the effective ignition energy of the explosive gas. This research is of great significance for the design of intrinsically safe circuits with high power.

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Experimental and Numerical Studies of Pressure and Gap Length Effects on Energy Deposition in Spark Discharge

Cited by 3 publications

References 11 publications

Numerical Study of Detonation Initiation by Spark Discharge in a Hydrogen-Oxygen High-Pressure Gas Mixture

Numerical Study of Detonation Initiation by Spark Discharge in a Hydrogen-Oxygen High-Pressure Gas Mixture

Comparing of the characteristics of thermal spray coating technologies: air-fuel detonation aluminum spraying onto steel with other technologies

Effective ignition energy for capacitor short-circuit discharge in explosive environments

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