Effects of photoionization and overvoltage on simultaneous discharges

Pan, Cheng; Yu, Meng; Wu, Kai; Cheng, Yonghong

doi:10.1109/tdei.2014.004220

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…A corona is a selfsustainable discharge that can be maintained without an external ionization source [4][5][6][7][8]. When an onset voltage is applied to the needle electrode in a needle-to-plane configuration, a corona will result in localized breakdown [9,10]. In a corona discharge, the molecules and atoms are always in the excited state in a nonthermal equilibrium plasma, which has been extensively used in various applications of modern technology, such as surface processing, electrostatic precipitation, ozone production, and many others [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of negative needle‐to‐plane corona in air under various environmental parameters

Feng

Sun

2018

IEEJ Transactions Elec Engng

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In this work, an axisymmetric finite element model and a corona discharge measurement system are used to investigate the negative corona discharge process in air under different environmental conditions. The Trichel pulse train, distribution of electron density and electric field, and the electron generation rate are shown. Pulse frequency, critical electric field, and critical electron generation rate are studied at different values of temperature, relative humidity, and air pressure. The results show that the pulse frequency has a strong relationship with the critical electric field and critical electron generation rate. The pulse frequency increases linearly with the ambient temperature and the relative humidity, while it decreases with the air pressure. This numerical model is helpful in better understanding the mechanisms of negative corona discharge under various environmental parameters. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling of negative needle‐to‐plane corona in air under various environmental parameters

Feng

Sun

2018

IEEJ Transactions Elec Engng

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“…18 Classical integral methods were utilized to calculate the photoionization source term and then an improved Eddington approximation is shown to be very accurate to calculate the photoionization term. [19][20][21][22] However, it is inevitable that these approaches are time consuming. Therefore, Bourdon has developed the improved model by more accurately accounting for the spectral dependence of the photoionization and a set of three Helmholtz differential equations were presented.…”

Section: Introductionmentioning

confidence: 99%

Ion-impact secondary emission in negative corona with photoionization

Sun

2017

AIP Advances

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A corona discharge measurement system and simulation model are presented to investigate the effects of photoionization and ion-impact secondary emission process in negative corona discharge. The simulation results obtained is shown good agreement with experimental observations. Distribution of electron density along the symmetry axis at three critical moments is shown and the role of photoionization in negative corona discharge is clearly explained. Moreover, the current pulses are also presented under different secondary emission coefficients and the effect of the secondary emission coefficient is discussed.

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The role of negative corona in charged particle dynamics

Sun

Yang

et al. 2017

Simulation Modelling Practice and Theory

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Effects of photoionization and overvoltage on simultaneous discharges

Cited by 6 publications

References 16 publications

Numerical modeling of negative needle‐to‐plane corona in air under various environmental parameters

Numerical modeling of negative needle‐to‐plane corona in air under various environmental parameters

Ion-impact secondary emission in negative corona with photoionization

The role of negative corona in charged particle dynamics

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