Charge injection between concentric cylindrical electrodes

Zahn, M.; Chatelon, Helene

doi:10.1063/1.323930

Cited by 17 publications

(6 citation statements)

References 8 publications

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“…Also note that for i,approaching 1 the accepted planar result is approached as expected (figure 1). The (numerical) results of Zahn and Chatelon (1977) are shown also and are seen to be less consistent than those of the present calculations.…”

Section: Transit Timecontrasting

confidence: 82%

“…The results are shown in figure 3. The points for io = 2 are from Zahn and Chatelon (1977), and for io = 20 were computed by the authors using Zahn and Chatelon's method. It can be seen that K(?,) = 0.42 gives good agreement consistent with the larger value (0.37) of K ( m ) found for f o 3 20.…”

Section: Transient Current (T S Tt)mentioning

confidence: 99%

“…Notable exceptions are the numerical analyses of Zahn and co-workers (e.g. Zahn and Chatelon 1977). Of particular interest is the current-time curve for times up to one transit time after the application of a voltage step.…”

Section: Introductionmentioning

confidence: 99%

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Unipolar charge injection transients in insulators of various geometries

Kershaw

Miller

1983

J. Phys. D: Appl. Phys.

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Single-carrier space-charge-limited (SCL) effects in planar, cylindrical, and spherical samples are considered. A novel approach facilitates approximate analytical solutions to the current transients following application of a voltage step. The SCL transit time varies by only about 15% with geometry, even for large ratios of outer to inner radii. In that case, large initial current spikes occur and there is an absence or weakening of the familiar current cusp. Injection from electrode edges in planar geometry samples can show similar behaviour.

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Section: Transit Timecontrasting

confidence: 82%

Section: Transient Current (T S Tt)mentioning

confidence: 99%

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Unipolar charge injection transients in insulators of various geometries

Kershaw

Miller

1983

J. Phys. D: Appl. Phys.

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“…The traditional inversion calculation of electric field and space charge [24,[27][28][29][30] from CCD fringe patterns is based on the careful positioning and counting of the sequence number n of the lines.…”

Section: Traditional Calculation Methodsmentioning

confidence: 99%

Space charge dynamics investigation based on Kerr electro-optic measurements and processing of CCD images

Shi

Yang

Sima

et al. 2013

IEEE Trans. Dielect. Electr. Insul.

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The Kerr electro-optic technique is used to investigate electric field and space charge effects using large Kerr constant propylene carbonate as the dielectric liquid with Kerr constant B≈1.22×10 -12 m/V 2 . However, improved accuracy of this technique to measure space charge distributions remains an important goal. This paper describes inversion algorithm research on obtaining accurate space charge distributions from Kerr measurements. The original charge-coupled device (CCD) image of light intensity was converted into grayscale values for improved calculation. The grayscale CCD image was transformed into the frequency domain through a two-dimensional Fourier transformation. Butterworth filtering techniques were employed for edge enhancement algorithms. The most important parameter for calculation of space charge distributions are the integer fringe numbers n in the sequence of light and dark fringes measured by the CCD camera. Comparison of the improved algorithm and traditional methods for calculating electric field and space charge distributions between a pair of stainless steel parallel plate electrodes was investigated. The space charge dynamics were also calculated after processing the CCD images with some improvements. The results showed the electric field was essentially uniform at early times of pulsed high voltages. This uniformity indicated the absence of space charge during the early transient interval, while a bipolar charge injection was found in the central region between electrodes at later times. For longer times the electric field and space charge distributions slowly became uniform again. Grayscale processing and Butterworth filtering played an important role in the improvement of the algorithm for better image quality and edge enhancement.

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“…A comprehensive review of the operational principles of the EHD in single-phase and condensation heat exchangers is provided by [6]. The injection of charges between two electrodes was dealt with in detail by Zahn and Chatelon [7]. The EHD enhancement of heat transfer has been demonstrated for 358 G. S. DULIKRAVICH ET AL.…”

mentioning

confidence: 99%