The surface energy deposited into gas during initiation of a pulsed plasma sheet discharge

Znamenskaya, I. A.; Lutskii, A. E.; Mursenkova, I. V.

doi:10.1134/1.1846850

Cited by 12 publications

(13 citation statements)

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“…The fraction of gas energy, which is spent directly for heating the gas during the pulse time, is defined by the value of reduced field E/N and amounts usually to 10-20% [21]. The bulk of energy deposition is spent for vibrational excitation of nitrogen molecules and for dissociation of O 2 .…”

Section: Discussionmentioning

confidence: 99%

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A Nanosecond High-Current Discharge in a Supersonic Gas Flow

2005

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The parameters of a nanosecond self-sustained volume discharge with pre-ionization of gas by UV radiation in an air flow are investigated. In the case of nonuniform distribution of the flow parameters, the discharge "contracts" to regions of lower density of gas, which become sources of higher intensity of glow. Comparison is made of the specific energy release in the self-sustained discharge at the stage of its uniform combustion and during self-localization in the zone of discontinuities (gradients) of gasdynamic parameters. It is demonstrated that, in the latter case, the effect of discharge on the characteristics of flow may increase significantly owing to an appreciable growth of specific energy deposition.

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Section: Discussionmentioning

confidence: 99%

“…The plasma-chemical block of the developed model was based on the processes investigated in [21,22]. The equation…”

Section: Self-sustained Volume Discharge In a Uniform Flow Of Gasmentioning

confidence: 99%

A Nanosecond High-Current Discharge in a Supersonic Gas Flow

2005

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“…For the sliding discharge of plasma electrodes, this fact was experimentally confirmed. 13,14 Experimental investigations showed that energy input goes in the area of the discharge chamber confined by the shock wave front and the energy input density equals q = q 0 V 0 / V. In this formula, q 0 is the energy input density when there is no shock wave in the discharge chamber, V 0 is the volume of the discharge section, and V is the volume of the discharge chamber area that is in front of the shock wave. So, the conditions realized in the setup were used as the boundary and initial conditions for the numerical simulation of the processes arising after the instant energy release.…”

Section: Discharge As a Source Of Instant Gas Heatingmentioning

confidence: 99%

“…It was shown 10,13,14 that about 20%-50% of the high current nanosecond discharge's energy is directly converted to the gas heating. The vibrational-translational relaxation time for the other part of the discharge's energy is quite long ͑more than 10 −4 s͒, so under the conditions of the described experimental setup, we may consider only the instant part of the energy release.…”

Section: Discharge As a Source Of Instant Gas Heatingmentioning

confidence: 99%

“…This relation ͑0.83 J / 0.11 J͒ was derived according to the electric scheme of the electrode part of the experimental setup. According to the previous investigations, 13,14 it was assumed that 50% of the energy goes to the instant heating ͑to translational degrees of freedom͒. In this case, the volumetric energy input density is 33.4% with respect to the total energy density behind the shock.…”

Section: -3mentioning

confidence: 99%

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Discontinuity breakdown on shock wave interaction with nanosecond discharge

2008

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Discontinuity breakdown conditions were experimentally realized by instant energy input in front of a plane shock wave. A shock tube and a special type of transversal nanosecond electric discharge with plasma electrodes were used for this research. A two-dimensional ͑2D͒ numerical simulation under experimental conditions has been undertaken. The pressure, density, temperature, and velocity fields have been examined. A comparison of numerical data and shadow images of a 2D flow after shock wave interaction with the discharge area was conducted. The geometry of the disturbed flowfield was found to be in good correspondence with one from numerical calculations. The results of the investigation also showed that, by using the described experimental setup, it is possible to achieve a special type of Richtmyer-Meshkov instability without applying an additional curved diaphragm.

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