Corona Discharges

Goldman, M.; Goldman, A.

doi:10.1016/b978-0-12-349701-7.50009-2

Cited by 113 publications

(111 citation statements)

References 57 publications

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“…• [14]. There is no clear explanation for this phenomenon other than the field lines beginning on the point and not crossing the ionization region terminate on the plane electrode outside of the radius R c ( figure 9).…”

Section: Appendixmentioning

confidence: 99%

“…For a given range of voltages V HV above a threshold V s , the electric current I consists in regular pulses (known as "Trichel pulses"), with a repetition rate around a few hundred kilohertz (far higher than audio frequencies: 20 Hz -20 kHz). As the voltage is increased, the pulses turn into a steady-state current regime (glow discharge) until a spark occurs [2,8,10,14,13,26]. In the "Trichel pulses" regime, the frequency of the pulses depends on various factors such as the geometrical and electrical configurations of the electrodes but also on the surface properties.…”

Section: Principle and Design Of The Corona Discharge Velocimetermentioning

confidence: 99%

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Corona Discharge Velocimeter

Béquin¹,

Joly²,

Herzog³

2018

Acta Acustica united with Acustica

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SummaryAn acoustic velocity sensor is described. It uses a small volume of ionized gas as sensing element to estimate the velocity of air particles, especially their oscillations caused by an acoustic perturbation. The generation of charged particles is performed by a negative point-to-plane discharge, the plane anode being split into two electrically insulated parts. The principle of this velocity sensor is based on the measurement of the radial deflection of the charged particles which flow between the point and the two half-planes, this deflection being caused by the motion of the air particles resulting from the acoustic field. An electroacoustic model of this velocity sensor is proposed, based on the fluctuations of the current density distribution over the plane electrodes. An experimental set-up is developed using a waveguide. It allows to compare simultaneously the acoustic velocity deduced from the corona discharge sensor on one side, and that resulting from the two-microphone meth od on the other side. This paper also proposes a parametric study to quantify the influence of the electrical and geometrical parameters of the discharge on this acoustic sensor.

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Section: Appendixmentioning

confidence: 99%

Section: Principle and Design Of The Corona Discharge Velocimetermentioning

confidence: 99%

Corona Discharge Velocimeter

Béquin¹,

Joly²,

Herzog³

2018

Acta Acustica united with Acustica

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“…However, if the electron is too close to the electrode inside the critical volume, the avalanche strikes the electrode before it can reach the critical size of 10 to form a detectable discharge pulse [130]. The seed electrons are delivered by negative ions ofO^".…”

Section: Dc-voltagementioning

confidence: 99%

Study of electric discharge and space charge formation phenomena in the air gaps of an ice-covered insulator using an icicle/ice-covered plate electrode system =

Yu¹

2007

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“…The features of a corona discharge vary considerably among different gases. A corona discharge in electronegative gas can be classified into three phases [7]: (1) auto-stabilization, (2) Trichel pulse, and (3) continuous current discharge. Trichel pulses [8] are normally regular pulses with a short duration (tens of ns) and a pulse period of several ms. Trichel pulses only occur in electronegative gases, such as air [9], whereas in electropositive gas, such as nitrogen, a corona discharge exists in continuous current without a pulse.…”

Section: Introductionmentioning

confidence: 99%

Space and Time Domain Finite Volume Method for Numerical Simulation of Negative Corona Discharge in Air

Wang¹

2016

Journal of Electrical Engineering and Technology

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-In this paper, a space and time domain finite volume method is proposed to study the characteristics of space charges on a bar-to-plate geometry. Three ionic species, namely, positive ions, negative ions, and electrons, are considered. A finite element method is used to solve Poisson's equation, and a finite volume method is used to solve charge transport equation. Different time steps based on space domain and time domain are applied to improve computational efficiency when solving the charge transport equation. Four points are marked to indicate the characteristics of a Trichel pulse. Density distributions of three ionic species and electrical field strength along the axis are presented. Trichel pulses on a bar-to-plate geometry are simulated and compared with the experimental results. Good agreements are obtained, thereby confirming the validity of the proposed method.

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Corona Discharges

Cited by 113 publications

References 57 publications

Corona Discharge Velocimeter

Corona Discharge Velocimeter

Study of electric discharge and space charge formation phenomena in the air gaps of an ice-covered insulator using an icicle/ice-covered plate electrode system =

Space and Time Domain Finite Volume Method for Numerical Simulation of Negative Corona Discharge in Air

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