PIV analysis of the homogeneity of energy deposition during development of a plasma actuator channel

Glazyrin, F. N.; Znamenskaya, I. A.; Mursenkova, I. V.; Naumov, D. S.; Sysoev, N. N.

doi:10.1134/s1063785016010223

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…For 3D simulations, we use the uniform and non-uniform energy deposition models. In both cases, the spatial energy distribution in zone III (figure 4) is assumed to be uniform in the z-direction, which is confirmed by experimental observations [44]. The longitudinal cross-sections ( = z const) are consistent with experimental images and 2D simulations.…”

Section: D Numerical Simulationssupporting

confidence: 80%

Shock wave interaction with a thermal layer produced by a plasma sheet actuator

Koroteeva¹,

Znamenskaya²,

Orlov³

et al. 2017

J. Phys. D: Appl. Phys.

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This paper explores the phenomena associated with pulsed discharge energy deposition in the near-surface gas layer in front of a shock wave from the flow control perspective. The energy is deposited in 200 ns by a high-current distributed sliding discharge of a ‘plasma sheet’ type. The discharge, covering an area of mm2, is mounted on the top or bottom wall of a shock tube channel. In order to analyse the time scales of the pulsed discharge effect on an unsteady supersonic flow, we consider the propagation of a planar shock wave along the discharge surface area 50–500 μs after the discharge pulse. The processes in the discharge chamber are visualized experimentally using the shadowgraph method and modelled numerically using 2D/3D CFD simulations. The interaction between the planar shock wave and the discharge-induced thermal layer results in the formation of a lambda-shock configuration and the generation of vorticity in the flow behind the shock front. We determine the amount and spatial distribution of the electric energy rapidly transforming into heat by comparing the calculated flow patterns and the experimental shadow images. It is shown that the uniformity of the discharge energy distribution strongly affects the resulting flow dynamics. Regions of turbulent mixing in the near-surface gas are detected when the discharge energy is deposited non-uniformly along the plasma sheet. They account for the increase in the cooling rate of the discharge-induced thermal layer and significantly influence its interaction with an incident shock wave.

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Section: D Numerical Simulationssupporting

confidence: 80%

Shock wave interaction with a thermal layer produced by a plasma sheet actuator

Koroteeva¹,

Znamenskaya²,

Orlov³

et al. 2017

J. Phys. D: Appl. Phys.

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show abstract

“…First, a conducting channel is formed in the interelectrode gap; this process is accompanied with propagation of a cylindrical shock wave in the gas surrounding the discharge; this shock wave dissipates quite quickly into a spherical compression-rarefaction (blast) wave. Similar structures were observed in [15]. After the v x v y v z wave runs away, a hot area with a low density remains near the plate surface.…”

supporting

confidence: 75%

Three-Dimensional Flow Structure in the Vicinity of the Pulsed Surface Arc Discharge in a Magnetic Field

2021

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The structure of a flow that appears during the motion of a pulsed surface arc discharge in a transverse magnetic field is described. It is shown that the motion of the plasma channel leads to the formation of a toroidal vortex. The typical velocity of gas inflow to the wall in the aerodynamic wake of the arc was 30-50 m/s and corresponded to the value of up to 40% of the maximum expansion velocity of the gas during the current pulse.

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“…Solid particles of TiO 2 of diameter 1 µm were used as tracers. The problem of seeding the test area inside the shock tube channel has been solved specifically for one-run experiments at low pressure [41,42]. Excess amounts of tracer particles were injected in the camera, and then seeded air in the shock tube channel was pumped down to operational pressure.…”

Section: Methodsmentioning

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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PIV analysis of the homogeneity of energy deposition during development of a plasma actuator channel

Cited by 10 publications

References 8 publications

Shock wave interaction with a thermal layer produced by a plasma sheet actuator

Shock wave interaction with a thermal layer produced by a plasma sheet actuator

Three-Dimensional Flow Structure in the Vicinity of the Pulsed Surface Arc Discharge in a Magnetic Field

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

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