Experiment and simulation calculation of micro-cavity dielectric barrier discharge

The characteristics of spark ignition with a constant volume combustion chamber (CVCC) is evaluated for the efficiency of capacitive-assisted ignition (CAI), such as spark kernel and flame growth. The conventional spark method and matching effect of high voltage (MEHV) method are evaluated to compare the spark growth distribution characteristics. To do this study, a plasma system is used and is consisted of input power, three capacitors, a transformer, high voltage cable, J-type of a spark plug, diode, and CVCC. The experiment is conducted under various operating conditions, such as 1 bar, 295 K of initial temperature, 50, 100, 150 V of ignition box, 400 V of MEHV, 0.7 ms of spark duration, and 0 kΩ of plug resistor. The results show that the spark growth at the initial voltages of 100 V and 150 V has the same characteristic, and the surface area is increased by 13 mm2 at 150 V compared to 100 V because capacitance energy stored in three capacitors is efficiently induced by the effect of dielectric breakdown and electron collision. Consequently, the spark growth of MEVH is widely distributed atmospheric more than the conventional spark, and the internal temperature of the spark kernel could be presumed to change the non-thermal plasma to thermal plasma by MEHV.

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“…where constant value (A) is related to density (n), and n is defined as the following integral value [8]:…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Ignition Effect in Constant Volume Combustion Chamber Based on Matching Effect of High Voltage (MEHV) Method

Kim

Han

2020

Energies

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“…The electrode structure affects the uniformity of the electric field distribution, so different structures have different discharge characteristics and can have different applications. Combining with the other scholars and our group [18][19][20][21][22][23][24], we have established two groups of comparative experiments to study the characteristics of DBD corona discharge with small curvature radius electrodes. A reduced electric field was adopted to analyze the variation of average electron energy and the difference in molecular vibration temperature, and the effect of the needle electrode corona on transfer of charge and energy were discussed.…”

Section: Introductionmentioning

confidence: 99%

Corona discharge effect on charge and energy transfer in dielectric barrier discharge

Sun¹,

Liu²,

Dong³

et al. 2019

Phys. Scr.

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To study characteristics of corona discharge effect on dielectric barrier discharge (DBD) with small curvature radius electrodes, two sets of comparative experiments were conducted on plate-plate with multi-needle-plate electrode structures and plate-plate with microcavity-plate electrode structures. At first, V-Q Lissajous figures were employed to analyze the air-gap voltage and charge transport in the first part of the experiment, and the result showed that the transferred charge of the multi-needle-plate electrode structure was about 1.5 times that of the plate-plate structure under the same power consumption. The second part of the experiment verified the above result, that is, the corona discharge effect on the microcavity produced a greater amount of transferred charge. Then, a reduced electric field was adopted to analyze the variation of average electron energy and the difference in molecular vibration temperature, and the corona discharge effect of the needle electrode on transfer of charge and energy are discussed. It was revealed that, in the non-uniform electric field of DBD, the local reduced electric field of the electrode tip with small radius of curvature was up to 750 Td, but the reduced electric fields in most of the air gaps were far lower than those of the plate-plate structure. Therefore, the average electron energy around the electrode tip was about 13 eV, which facilitates the collision and ionization of the electrons in air and the production of a large amount of charge. However, in this case, the temperature of molecular vibration was lower, and the excited particles generated in the discharge process were less than those generated by the plate-plate structure.

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Ignition-area extension of dielectric barrier discharge under high temperature

Ichiki¹,

Komatsu²,

Yakushiji³

et al. 2021

Results in Physics

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Experiment and simulation calculation of micro-cavity dielectric barrier discharge

Cited by 3 publications

References 11 publications

Evaluation of the Ignition Effect in Constant Volume Combustion Chamber Based on Matching Effect of High Voltage (MEHV) Method

Evaluation of the Ignition Effect in Constant Volume Combustion Chamber Based on Matching Effect of High Voltage (MEHV) Method

Corona discharge effect on charge and energy transfer in dielectric barrier discharge

Ignition-area extension of dielectric barrier discharge under high temperature

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