Numerical simulation of a plasma actuator based on ion transport

Yamamoto, Seiya; Fukagata, Koji

doi:10.1063/1.4809975

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…These studies can be grouped by how much detail they use to model the physics associated with the plasma actuator. For example, the kinematic approach is very detailed but computationally very expensive, the continuous model approach that solves the drift-diffusion equations (e.g., Yamamoto andFukagata, 2013, Nishida, Nonomura, and is moderately detailed and computationally expensive, and the continuous model approach that introduces an assumption about the Debye length is less detailed but computationally cheap. This suggests that the degree of detail used to model the plasma actuator should be based on the objectives of the study.…”

Section: Introductionmentioning

confidence: 99%

Computational and experimental analysis of flow structures induced by a plasma actuator with burst modulations in quiescent air

Aono

Sekimoto

Sato

et al. 2015

Mechanical Engineering Journal

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Characteristics of flow fields produced by a dielectric barrier discharge plasma actuator in quiescent air are numerically investigated. A time-dependent localized body-force distribution is utilized to mimic the effect of the plasma actuator with modulated bursts. The computed time-averaged and instantaneous flow fields are compared with the experimental results by using high-speed schlieren photography and particle image velocimetry. The computed flow fields are in good agreement with the experimental results when the nondimensional parameter (D c) is within the appropriate range. With an appropriate choice of D c , the location and size of the induced flow structures, computed with respect to the maximum flow velocity parallel to the wall, are quantitatively in agreement with the experimental results. Also considered are the effects of the burst frequency (non-dimensionalized by the chord length and the free-stream velocity of assumed separated flow control experiment) on the induced flow. The results show that changes in the burst frequency cause insignificant changes in the magnitude of the time-averaged flow parallel to the wall, but they cause significant fluctuations in the amplitude and power spectral densities of that flow.

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Section: Introductionmentioning

confidence: 99%

Computational and experimental analysis of flow structures induced by a plasma actuator with burst modulations in quiescent air

Aono

Sekimoto

Sato

et al. 2015

Mechanical Engineering Journal

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“…Compared with the kinetic model, the fluid model is computationally cheaper; however, in order to resolve the discharge formation, a sufficiently fine computational grid and a short time step are required. In the previous studies on SDBD plasma actuator using the fluid model, 8,10,13,18,[21][22][23][24][25] both the discharge structure and the generated body force are investigated, but the computational grid spacing used in these studies are significantly different from one another: it ranges from 1 100 µm. It is hardly known whether the results are grid-convergent and it is hard to say whether the obtained results are reasonable enough to analyze the discharge process and the mechanism of body force generation.…”

Section: Introductionmentioning

confidence: 99%

Influence of grid resolution in fluid-model simulation of nanosecond dielectric barrier discharge plasma actuator

Hua

Fukagata

2018

AIP Advances

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Two-dimensional numerical simulation of a surface dielectric barrier discharge (SDBD) plasma actuator, driven by a nanosecond voltage pulse, is conducted. A special focus is laid upon the influence of grid resolution on the computational result. It is found that the computational result is not very sensitive to the streamwise grid spacing, whereas the wall-normal grid spacing has a critical influence. In particular, the computed propagation velocity changes discontinuously around the wall-normal grid spacing about 2 μm due to a qualitative change of discharge structure. The present result suggests that a computational grid finer than that was used in most of previous studies is required to correctly capture the structure and dynamics of streamer: when a positive nanosecond voltage pulse is applied to the upper electrode, a streamer forms in the vicinity of upper electrode and propagates along the dielectric surface with a maximum propagation velocity of 2 × 108 cm/s, and a gap with low electron and ion density (i.e., plasma sheath) exists between the streamer and dielectric surface. Difference between the results obtained using the finer and the coarser grid is discussed in detail in terms of the electron transport at a position near the surface. When the finer grid is used, the low electron density near the surface is caused by the absence of ionization avalanche: in that region, the electrons generated by ionization is compensated by drift-diffusion flux. In contrast, when the coarser grid is used, underestimated drift-diffusion flux cannot compensate the electrons generated by ionization, and it leads to an incorrect increase of electron density.

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“…In Eqs. (2), (3) and (4), μ k (with k=e, p, n) and D k are the mobility and diffusion coefficient of the charged particles, respectively. α and η are the ionization and attachment coefficient, r ep and r pn are the electron-positive ion and positive ion-negative ion recombination coefficients, respectively.…”

Section: Simulation Modelmentioning

confidence: 99%

“…The drift terms of Eqs. (1), (2) and (3) are evaluated by the upwind scheme with the MUSCL interpolation, and the diffusion terms are evaluated by the central difference scheme. The time integration is conducted by the LU-ADI type implicit scheme to suppress simulation cost.…”

Section: Simulation Modelmentioning

confidence: 99%

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Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Nakano

Nishida

2016

47th AIAA Plasmadynamics and Lasers Conference

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Recently, dielectric barrier discharge plasma actuator (DBDPA) is actively researched as an active flow control devices. However, the induced flow is too slow to be installed on the aerodynamic bodies to control a high-speed flow. To this problem, DualGrounded Tri-Electrode plasma actuator (DGTEPA) was suggested as a solution which can make stronger flow with better efficiency. So in this research, we investigate the discharge structure and body force field of the conventional DBDPA and the DGTEPA by a plasma simulation to clarify the mechanism that the DGTEPA gains its performance. First, we evaluated the validity of the simulation results. Although there are some quantitative and qualitative discrepancies, we confirmed they are almost qualitatively in agreement with the experiments. Second, we discussed about the distribution of the plasma density and confirmed that there is another discharge occurs near the third electrode of the DGTEPA. In addition, when the third electrode is close enough to the AC electrode edge, the plasma near the third electrode is supplied to the near region of the AC electrode edge. Last of all, we examined the body force distribution and we found there are strong body force regions in where the high density plasma exists. Also when the third electrode is close enough to the AC electrode edge, the body force is drastically enhanced because of the expansion of a discharge region near the AC electrode edge. NomenclatureD e , D p , D n e = elementary charge = diffusion coefficient for electron, positive ion and negative ion E f = body force vector = electric field vector j e , j p , j n r = electron, positive ion and negative ion number density ep r = recombination coefficient between electron and positive ion pn t = time = recombination coefficient between positive ion and negative ion p = ambient pressure v e α = ionization coefficient = mean velocity of electron ε 0 , ε r γ = secondary electron emission coefficient = electric permittivity in the vacuum and relative electric permittivity of the dielectric μe, μp, μn = time index during navigation η = attachment coefficient σ = surface charge density 1 Student of Master Course, 2-24-16, Nakacho, Koganei, Tokyo, 184-8588, JAPAN, Mechanical System Engineering, Student Member AIAA.

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Numerical simulation of a plasma actuator based on ion transport

Abstract: Articles you may be interested inEffect of dielectric barrier discharge plasma actuators on non-equilibrium hypersonic flows

Cited by 14 publications

References 20 publications

Computational and experimental analysis of flow structures induced by a plasma actuator with burst modulations in quiescent air

Computational and experimental analysis of flow structures induced by a plasma actuator with burst modulations in quiescent air

Influence of grid resolution in fluid-model simulation of nanosecond dielectric barrier discharge plasma actuator

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

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