Modeling and comparison of sinusoidal and nanosecond pulsed surface dielectric barrier discharges for flow control

Unfer, Thomas; Boeuf, Jean-Pierre

doi:10.1088/0741-3335/52/12/124019

Cited by 62 publications

(38 citation statements)

References 17 publications

(18 reference statements)

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“…Since the dominant effect of the NS-DBD actuator is known to be the thermal effect (namely, Joule heating) [17,19,28], in the numerical simulation the effect of the discharge of the NS-DBD actuator is represented as instantaneous gas heating [33]. In this paper, the NS-DBD numerical simulation is based on phenomenological theory.…”

Section: Discharge Position and Parameter Setting Of The Plasma Actuatormentioning

confidence: 99%

“…Leonov et al [26] believe that NS-DBD will generate random local thermal disturbance near the wall in a relatively long-time scale (> 100 us) after discharge, and will form compression wave in a very short time (1-10 us). Sergey, Unfer, Roupassov, Correale, Little, Adamovich et al [14,19,20,27,28] suggest that shock wave, which is the dominant factor of flow control, is generated after NS-DBD discharge due to thermal effect. This paper focuses on the research of NS-DBD plasma actuator on the control of increasing lift and reducing drag of two-section airfoil.…”

Section: Introductionmentioning

confidence: 99%

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Effect of NS-DBD Actuator Parameters on the Aerodynamic Performance of a Flap Lifting Device

Chen¹,

Wei

Shi

2019

Applied Sciences

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The flap lift device is an important part of the conventional configuration of aircrafts and has an important impact on the aerodynamic performance. In this paper, a high-efficiency, simple, and energy-saving nanosecond dielectric barrier discharge (DBD) plasma actuator is placed in the vicinity of the flap lift device to improve the aerodynamic performance of the flap by controlling the flow field. The two-dimensional airfoil GAW-1 and its 29% flap were selected as the research objects, and the nanosecond (NS) DBD actuators were fixed at different locations near the deflection angle of the 10°flap. The excitation frequency, pulse width, and energy density parameters of the pulse discharge were adjusted, and then, the effects of parameter changes on aerodynamic characteristics of the airfoil were studied by numerical simulation. The simulation results show that adjusting the excitation frequency on the aerodynamic drag is weak and that the effect on the aerodynamic lift is obvious. The increase of the discharge pulse width will have a more significant effect on the flow field, i.e., a proper increase of the discharge pulse width can achieve better drag reduction, and increase lift after a stall at a high angle of attack. Although the increase of discharge energy density can strengthen the pulse perturbation effect on the flow field, it also contributes to some adverse effects and has no obvious optimization effect on the control efficiency of lift increase and drag reduction.

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Section: Discharge Position and Parameter Setting Of The Plasma Actuatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of NS-DBD Actuator Parameters on the Aerodynamic Performance of a Flap Lifting Device

Chen¹,

Wei

Shi

2019

Applied Sciences

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“…And what are the spatial distribution of these effects? According to the numerical simulations 15,26,27,28 and experiments, 25,24 the main effect of the NSDBD is fast gas heating, whereas the momentum forcing is neglected. The discharge energy releases in a thin plasma layer in time shorter than 1µs under atmospheric pressure.…”

Section: Empirical Modelingmentioning

confidence: 99%

“…Although the fast-gas-heating process and energy transfer were investigated by numerous numerical simulations 29,27,30,15,26,28 and experiments, 25,31 there is no simple relation between the reduced electric field (E/N ) and the gas-heating ratio (η R ) at various pressures. Consequently, the gas-heating ratio is statistically approximated from the existing numerical simulations and experiments, as shown in Tab.…”

Section: A Energy Released For the Fast Gas Heatingmentioning

confidence: 99%

An Empirical Model of Nanosecond Pulsed SDBD Actuators for Separation Control

Chen

Hao

Zhang

et al. 2013

43rd Fluid Dynamics Conference

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An one-zone inhomogeneous phenomenological plasma model is constructed based on the experiments and theoretical results to avoid the unaffordable computational cost of plasma-fluid models and kinetic models for Nanosecond pulsed Dielectric Barrier Discharge (NSDBD) plasma actuator used in flow control simulation. The present model is coupled to unsteady compressible Navier-Stokes equations as a source term in the energy equation. The coupled system is validated by predicting the flow induced by the NSDBD plasma actuator mounted on a flat plate and a circular cylinder in the quiescent air. The results show that the wave positions, wave speeds and wave structures are well predicted by comparing with experimental results. The present model is applied to investigate separation control over NACA0015 airfoil at a low and a high Reynolds numbers Re = 100, 000 and 1.15 × 10 6 at post-stall angles of attack by using Large-Eddy Simulation (LES) and Unsteady ReynoldsAveraged Navier-Stokes equations (URANS). At the low Reynolds number, main control mechanisms are the fast transition to turbulence promoted by the plasma actuation and the separation-bubble shedding at the pulse repetitive rate. At the high Reynolds number, only the URANS is carried out for the sake of reducing computational cost. The main control mechanism is that the spanwise vortices induced by plasma actuation bring outer high-energy fluid into near wall region and sweep along the upper surface. At low and high Reynolds numbers, the shedding frequency of the trailing-edge vortex is tuned to the pulse repetitive rate by shedding of separation bubbles and spanwise vortices, respectively. In conclusion, the present model can be used to investigate flow-control mechanisms and parameter study of NSDBD plasma actuator with trivial computational cost.

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“…Different models have been proposed to simulate the discharge, which mainly include particle-in-cell (PIC) model [12][13][14][15], Monte Carlo model [16,17], five-moment fluid model [7,18], three-equation drift-diffusion fluid model [4,[6][7][8]10], two-equation drift-diffusion fluid model [19][20][21][22][23][24][25], and some other analytical models according to the fidelity of the physical principles. The PIC and Monte Carlo models based on the principle of particle collisions, typically involve the solution of the Boltzmann equation, which is computation expensive, requiring a long computation time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Chemical Reactions on the Discharge Characteristics and Energy Balance of a Nanosecond Repetitive Pulsed Dielectric Barrier Discharge

et al. 2019

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Numerical investigation on a nanosecond repetitively pulsed dielectric barrier discharge (NS-DBD) in air is a temporal and spatial multi-scale problem involving a large number of species and chemical reactions. To know the effects of the species and chemical reactions on the discharge characteristics and energy balance, a high voltage repetitive plane to plane NS-DBD is numerically studied. Four groups of species and the corresponding chemical reactions are adopted in the investigation. The most complex one has 31 species and 99 chemical reactions that contains all reaction types, in particular, the vibrational-translational relaxation reactions, whereas the simplest one has only 4 species and 4 reactions, which represents the main kinetic processes. The others are in between. The discharge energy reaches to a periodic phase equality state after the second pulse in the repetitive pulses, and the present analysis is focused on the 7th pulse. All the N 2 /O 2 mixture reaction models predict almost the same discharge energies, which are qualitatively similar with that in the simplified 4-species model. The prediction of the discharge energy is determined by the electronic excitation and the energy gain by ions, but the vibrational excitation, negative ions, associative ionization, dissociation of nitrogen and oxygen molecules have very weak effects. The gas heating is determined by the exothermic reactions and the ions. The main processes in the fast and slow gas heating are the energy release of ions and the exothermic reactions, respectively. The negative ions, vibrational excitation, and associative ionization have very weak effects on the gas heating during the high voltage pulse, but they have considerable effects at a larger time scale. The magnitudes of the fast gas heating efficiency (η GH ) are in the range of 41%∼47% in the N 2 /O 2 mixture reduced kinetic models, but η GH is higher in the 4-reaction model.

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Modeling and comparison of sinusoidal and nanosecond pulsed surface dielectric barrier discharges for flow control

Cited by 62 publications

References 17 publications

Effect of NS-DBD Actuator Parameters on the Aerodynamic Performance of a Flap Lifting Device

Effect of NS-DBD Actuator Parameters on the Aerodynamic Performance of a Flap Lifting Device

An Empirical Model of Nanosecond Pulsed SDBD Actuators for Separation Control

Numerical Investigation on the Effects of Chemical Reactions on the Discharge Characteristics and Energy Balance of a Nanosecond Repetitive Pulsed Dielectric Barrier Discharge

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