Negative corona in wire-plate electrostatic precipitators. Part I: Characteristics of individual tuft-corona discharges

Lawless, P.A.; McLean, K.J.; Sparks, L.E.; Ramsey, Geddesh H.

doi:10.1016/0304-3886(86)90006-9

Cited by 38 publications

(8 citation statements)

References 2 publications

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“…They are irregularly spaced along the electrode and preferentially appear at imperfections on the surface. As the voltage is increased, the number of tufts increases and the distribution of tufts becomes more uniform [24]. The corona onset voltages with different relative humidity at different air flow rate were approximated by the modified Peek equation, Equation (9), and were in reasonable and systematical agreement with the experiments.…”

Section: Resultsmentioning

confidence: 90%

An experimental study of relative humidity and air flow effects on positive and negative corona discharges in a corona-needle charger

Yawootti

Intra

Tippayawong

et al. 2015

Journal of Electrostatics

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Section: Resultsmentioning

confidence: 90%

An experimental study of relative humidity and air flow effects on positive and negative corona discharges in a corona-needle charger

Yawootti

Intra

Tippayawong

et al. 2015

Journal of Electrostatics

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“…Essentially, this suggestion is made by Lawless et al (1986) in their discussion of tuft corona discharges. Our numerical and asymptotic calculations will demonstrate that if e f >(n\,-c )/50 then the corona is steady, whereas if e f < (n | r )/50 then the corona will oscillate.…”

Section: >\^=Vmentioning

confidence: 96%

“…For details of the applications to HVDC see Davis & Hoburg (1986), and for precipitators see Corbin (1987) and Lawless et al (1986).…”

Section: Introductionmentioning

confidence: 99%

Coronas and the space charge problem

Budd

1991

Eur. J. Appl. Math

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This paper presents a detailed analysis of a model for a positive corona discharge, and discusses the relationship between the model and the space charge equations which predict the macroscopic motion of charged ions in a gas. The study is restricted to the asymptotic behaviour of the discharge for large time, and it does not consider its initial or burst phases in detail.One prediction of this model is the existence of a steady state solution to the space charge equations that may lose stability to a travelling wave disturbance which then grows into a strongly pulsed oscillation.We compare some numerical calculations with an asymptotic analysis of the discharge and find good agreement.

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“…The waveform of the discharge current is a superposition of several sawtoothlike waveforms with a negative dc bias. Small light emission spots moving rapidly along the wire electrode were randomly generated, and these are known as corona tufts [18]- [20]. A longer exposure time shows the motion of the corona tufts.…”

Section: Basic Properties Of the Ehd Gas Pumpmentioning

confidence: 99%

Efficiency of a Wire-Rod Type Electrohydrodynamic Gas Pump Under Negative Corona Operation

Takeuchi

Yasuda

2009

IEEE Trans. Plasma Sci.

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A wire-rod type electrohydrodynamic (EHD) gas pump was driven by a negative applied voltage with pipes of different inner diameters. An EHD gas flow was generated from a wire electrode to a rod electrode under a negative corona discharge. The flow velocity was proportional to the applied voltage and the square root of the discharge current. Before spark onset, the maximum volumetric flow rate of 43 L/min was achieved with a pipe having an inner diameter 20 mm, and the pump efficiency was higher than that of a conventional dc motor fan. In a narrow channel, the corona discharge became unstable. In addition, the EHD gas flow velocity was smaller because a pressure loss due to the rod electrode became significant, resulting in a lower electromechanical efficiency.

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Negative corona in wire-plate electrostatic precipitators. Part I: Characteristics of individual tuft-corona discharges

Cited by 38 publications

References 2 publications

An experimental study of relative humidity and air flow effects on positive and negative corona discharges in a corona-needle charger

An experimental study of relative humidity and air flow effects on positive and negative corona discharges in a corona-needle charger

Coronas and the space charge problem

Efficiency of a Wire-Rod Type Electrohydrodynamic Gas Pump Under Negative Corona Operation

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