Transverse Electric Discharges in Supersonic Air Flows: Mechanisms of Discharge Propagation and Instability

Ershov, A.P.; Surkont, O. S.; Timofeev, I. B.; Шибков, В.М.; Chernikov, V. A.

doi:10.1023/b:hite.0000039979.89955.df

Cited by 21 publications

(13 citation statements)

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“…4 is apparently associated with two factors, namely, with the slow expansion of the channel diameter along the flow and with the variable extent of the discharge in space [4,5]. While the effect of the former factor is obvious, the effect of the latter factor needs to be explained.…”

Section: Gas Temperaturementioning

confidence: 99%

“…The asynchronous mode produces a spectrum averaged over the time of observation and may be used to investigate dc discharges. The time of recording one frame is ~20 ms; several spectra were recorded during a single run (with the flow duration of ~2 s [4]). Digital filtering of the signal could be used additionally to reduce the effect of amplification path noise and of thermal noise of the sensor.…”

Section: Optical Measuring Systemmentioning

confidence: 99%

“…While the effect of the former factor is obvious, the effect of the latter factor needs to be explained. The position of coordinate of secondary breakdown under conditions being investigated corresponds to z 0 ≈ 2-3 cm [4]. After repeated breakdown, the energy deposition to the remaining (z > z 0 ) part of the channel decreases, and the temperature in this part of the channel starts decreasing because of the losses due to thermal conductivity and diffusion.…”

Section: Gas Temperaturementioning

confidence: 99%

“…The experimental facility for developing pulsed discharges and a dc discharge in a supersonic jet was described in [4]. The facility was equipped with automated circuits for spectroscopic and probe measurements.…”

Section: Introductionmentioning

confidence: 99%

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Transverse electric discharges in supersonic air flows: microscopic characteristics of discharge

et al. 2004

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The spectroscopic and probe methods are used to measure the microscopic parameters of plasma of pulsed and stationary transverse discharges in a supersonic air jet flowing into a submerged space. The measurements are performed for the Mach number of flow M = 2, submerged space pressure p = 5 to 30 kPa, degree of the jet being off-design n ≈ 2, and discharge current I = 1 to 10 A. The discharge current dependences of the average values of gas temperature, charged particle concentration, and reduced electric field are measured for a discharge mode close to that of current generator. The measured values of gas temperature lie in the range of 1 to 3 kK, those of charged particles concentration -of 10 13 to 10 14 cm -3 , and of reduced electric field -of 40 to 20 Td. The axial distribution of temperature is characterized by high values of temperature even at short distances from the electrodes and by a slow decrease along the flow.

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Section: Gas Temperaturementioning

confidence: 99%

Section: Optical Measuring Systemmentioning

confidence: 99%

Section: Gas Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transverse electric discharges in supersonic air flows: microscopic characteristics of discharge

et al. 2004

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“…In 1970s-1980s, the study of glow discharges in a flow was associated with the production of cold homogeneous plasma as the active medium of high-power fast-flow lasers [4]. This paper is a continuation of the papers [5][6][7] devoted to the experimental study of electric discharges in supersonic flows of air at elevated pressure with the electrodes located in the plane perpendicular to the flow. The configuration of such a "transverse" discharge at not too low currents, which is observed in a wide range of velocities [1][2][3], is characterized by the presence of extended channels behind the anode and cathode located in parallel with the flow (Fig.…”

Section: Introductionmentioning

confidence: 99%

Transverse electric discharges in supersonic air flows: simulation of gasdynamic effects in the discharge channel

et al. 2006

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A model of heat source is validated for the description of the gasdynamic aspects of interaction between a discharge channel and supersonic flow, which are defined by the heating of gas. The model is based on the characteristic features of a discharge in supersonic flow, which are observed in the case of nonequilibrium plasma whose conductivity is defined by the degree of ionization, namely, rapid heating of air in the electrode regions and relatively low values of reduced electric field in extended discharge channels behind these regions. The rapid heating mechanism leads to a redistribution of the power of Joule heat to the front part of the channel, which enables one to simulate a discharge as a heat source with a short ellipsoidal zone of heat input. This approach enables one to attain agreement between the calculated axial distributions of temperature and velocity of flow and the experimental data. It is demonstrated that unsteady-state conditions of energy input make it possible to experimentally simulate gasdynamic effects of interaction between stationary heat sources and supersonic flow when single pulses are used and in the case of pulse-periodic mode.

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Plasma-dynamic discharges in transverse supersonic air flows

et al. 2006

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An experimental investigation is performed of modes of outflow into stationary air and of supersonic flow of a plasma jet developed by an impulse plasma generator using a plasma-dynamic discharge of magnetoplasma compressor at low values of energy deposition. A theoretical model is suggested which enables one to scale the experimental results to the injection of plasma jet into a flow of large cross section. The possibility is demonstrated of using such jets for bulk ignition of supersonic flows of combustible mixture.

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Transverse Electric Discharges in Supersonic Air Flows: Mechanisms of Discharge Propagation and Instability

Cited by 21 publications

References 1 publication

Transverse electric discharges in supersonic air flows: microscopic characteristics of discharge

Transverse electric discharges in supersonic air flows: microscopic characteristics of discharge

Transverse electric discharges in supersonic air flows: simulation of gasdynamic effects in the discharge channel

Plasma-dynamic discharges in transverse supersonic air flows

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