Gas phase component distribution during an arc discharge over an aqueous electrolyte

Orlov, A. M.; Yavtushenko, I. O.; Bodnarskii, D. S.

doi:10.1134/s1063784212030152

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…The formation of shock waves from pulsed discharges is the result of gas heating in the discharge volume, connected mainly to the collision of neutral and charged particles with excited internal degrees of freedom. In pulse discharges the collision of electrons with neutral molecules leads to ionization, excitation of internal degrees of freedom of the molecules and atoms and dissociation of the molecules, as well as to radiation and heating of the gas at high values of reduced electric field [31][32][33][34][35]. The speed and intensity of the resulting perturbations depend on the rate of conversion of electric discharge energy into heat energy and the spatial and temporal energy distribution-as shown in experimental studies and numerical modeling.…”

Section: Introductionmentioning

confidence: 99%

Influence of shock waves from plasma actuators on transonic and supersonic airflow

Mursenkova¹,

Znamenskaya²,

Lutsky³

2018

J. Phys. D: Appl. Phys.

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This paper presents experimental and numerical investigations of high-current sliding surface discharges of nanosecond duration and their effect on high-speed flow as plasma actuators in a shock tube. This study deals with the effectiveness of a sliding surface discharge at low and medium air pressure. Results cover the electrical characteristics of the discharge and optical visualization of the discharge and high-speed post-discharge flow. A sliding surface discharge is first studied in quiescent air conditions and then in high-speed flow, being initiated in the boundary layer at a transverse flow velocity of 50–950 m s−1 behind a flat shock wave in air of density 0.04–0.45 kg m−3. The discharge is powered by a pulse voltage of 25–30 kV and the electric current is ~0.5 kA. Shadow imaging and particle image velocimetry (PIV) are used to measure the flow field parameters after the pulse surface discharge. Shadow imaging reveals shock waves originating from the channels of the discharge configurations. PIV is used to measure the velocity field resulting from the discharge in quiescent air and to determine the homogeneity of energy release along the sliding discharge channel. Semicylindrical shock waves from the channels of the sliding discharge have an initial velocity of more than 600 m s−1. The shock-wave configuration floats in the flow along the streamlined surface. Numerical simulation based on the equations of hydrodynamics matched with the experiment showed that 25%–50% of the discharge energy is instantly transformed into heat energy in a high-speed airflow, leading to the formation of shock waves. This energy is comparable to the flow enthalpy and can result in significant modification of the boundary layer and the entire flow.

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