Force interaction of high pressure glow discharge with fluid flow for active separation control

Roy, Subrata; Gaitonde, Datta V.

doi:10.1063/1.2168404

Cited by 25 publications

(19 citation statements)

References 19 publications

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“…The model is anchored in the module based multiscale ionized gas (MIG) flow code [4][5][6][11][12][13]. The self-consistent formulation is solved using a Galerkin variational formulation based finite-element method [12,13] to obtain electron, positive and negative ions and neutral species densities of nitrogen and oxygen, and the electric potential in two spatial dimensions.…”

Section: I11 Approachmentioning

confidence: 99%

“…For accuracy and fidelity, it is essential that the force relations be derived from first principles through a simulation of the elementary mechanisms that yield the discharge. We are developing [4][5][6][7][8][9] such models in the following manner. First, a drift diffusion partially ionized gas model for atmospheric air-like N 2 /0 2 gas mixture is formulated for nine species.…”

Section: I11 Approachmentioning

confidence: 99%

“…Recent successful experiments and simplified numerical models for boundary layer flow actuation using dielectric surface discharge at atmospheric pressures show tremendous potential for aerospace and many other applications [1][2][3][4][5][6]. These watt-level actuators can efficiently apply large electrohydrodynamic (EHD) forces in a relatively precise and self-limiting manner, have rapid switch-on/off capabilities and require no moving parts.…”

Section: Introductionmentioning

confidence: 99%

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High-Fidelity Real Gas Model for RF Excited Plasma Flow Control

Roy¹

2007

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to the Department of Defense. Executive Service Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shell be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR/MONITOR'S ACRONYM(S) DISTRIBUTION/AVAILABILITY STATEMENT.ppfoved for publ to releai,' AFRL-SR-AR-TR.07_05di:tl'ibut ion Inli,aitctd0 SUPPLEMENTARY NOTES ABSTRACTWe demonstrate the prediction capability a self consistent finite-element formulation for mitigating inert gas flow separation using rf-driven dielectric barrier discharge. Specifically, several physical and geometric parameters such as the amplitude and shape of excitation, dielectric constants, initial ionization level, and electrode shape are studied. The effect of polyphase power supply to an array of actuators has also been explored. It is found that (a) favorable ranges of frequency and electric field exist for most effective flow control, (b) the momentum transfer to the neighboring gas is cumulative for an optimum phase angle and distance between the exposed electrodes. Also streamwise momentum transfer does not keep on increasing with the number of actuators. We extend our work towards developing a multidimensional first principles theoretical model of the non-equilibrium real gas discharge. The electric force field generated by asymmetrically arranged plasma actuator We have worked in close collaboration with Dr. Datta Gaitonde (VAAC/AFRL) code and to simulate electrodynamic mitigation of three-dimensional wing stall about a symmetric airfoil. These efforts set the basis for active flow control over a vehicle forebody. SUBJECT TERMS AbstractThis report is a summary of a two-year effort by the PI's research team and collaborators. We have demonstrated the prediction capability of module-based multiscale ionized gas (MIG) flow finite-element code for mitigating inert gas flow separation using rf-driven dielectric barrier discharge. We extended our work towards developing a multidimensional first principles theoretical model of the non-equilibrium real gas discharge. The electric force field generated by asymmetrically arranged plasma actuators operating at rf is self-consistently coupled to the gas dynamics of the air-like N 2 /0 2 gas mixtures. Specifically, several physical and geometric parameters such as the amplitude and shape of excitation, dielectric constants, initial ionization level, and electrode shape are studied. ...

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Section: I11 Approachmentioning

confidence: 99%

Section: I11 Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Fidelity Real Gas Model for RF Excited Plasma Flow Control

Roy¹

2007

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“…In this paper, we extend our 2D hydrodynamic model [8,10,21] into the 3D dc plasma simulation. The charge density q (= n i − n e ) and electric field E will be solved based on the first principles.…”

Section: Introductionmentioning

confidence: 99%

“…Such design leverages several advantages of non-mechanical micropumps. Over the last decade, many experiments and numerical simulation show that DBD actuators produce effects on drag reduction inside the boundary layer [5][6][7][8][9]. However, these traditional macroscale DBD actuators suffer from relatively small actuation at high speed flow (>30 m s −1 ).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional simulation of a microplasma pump

Wang¹,

Roy²

2009

J. Phys. D: Appl. Phys.

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We present a three-dimensional simulation of dielectric barrier discharge (DBD) using the finite element based multiscale ionized gas (MIG) flow code. The two-species hydrodynamic plasma model coupled Poisson equation and Navier-Stokes equation are solved using MIG flow code to predict complicated flow structure inside a plasma induced micropump. The advantage of such a micropump is rapid on/off switching without any moving parts. Results show a reasonable distribution for ion and electron densities as well as an electric field. The key factors of microplasma pump design are the location of actuators and input voltage. The flow rate of the microplasma pump is on the order of ml min −1 . Such a flow rate may be beneficial for micropropulsion in space.

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