Optimization of wire-rod electrostatic fluid accelerators

Wen, T.; Shen, Tsan-Ting; Wang, Hsiu-Che; Mamishev, A.V.

doi:10.1109/ectc.2013.6575578

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…The ions of the same polarity as anode drift towards the ground cathode, accelerating the bulk flow by collision with the neutral molecules (in the drift region). This EHD flow propulsion phenomenon also referred to in the literature as ionic wind, has been used in many practical applications, such as convective cooling [1][2][3], electrostatic precipitators (ESP) [4][5][6][7][8], airflow control [9,10] and as a turbulent boundary layer actuators [11]. The success of EHD technology has been limited due to the modest pressure achieved by the EHD thrusters; however, in applications where producing high pressure is not required, the EHD-driven flow can be of interest.…”

Section: Introductionmentioning

confidence: 99%

Analytical model for electrohydrodynamic thrust

et al. 2020

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Electrohydrodynamic (EHD) thrust is produced when ionized fluid is accelerated in an electric field due to the momentum transfer between the charged species and neutral molecules. We extend the previously reported analytical model that couples space charge, electric field and momentum transfer to derive thrust force in one-dimensional planar coordinates. The electric current density in the model can be expressed in the form of Mott–Gurney law. After the correction for the drag force, the EHD thrust model yields good agreement with the experimental data from several independent studies. The EHD thrust expression derived from the first principles can be used in the design of propulsion systems and can be readily implemented in the numerical simulations.

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Section: Introductionmentioning

confidence: 99%

Analytical model for electrohydrodynamic thrust

et al. 2020

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“…Corona discharge generates a flow of ions in a strong electric field between two electrodes; the high-velocity ions transfer their kinetic energy to the neutral air molecules by collisions that accelerate the gas in the direction of ion drift. This electrohydrodynamic (EHD) flow propulsion phenomenon, also referred to in the literature as ionic wind, is used in many practical applications, such as convective cooling, [1][2][3][4][5][6] electrostatic precipitators (ESPs), [7][8][9][10] plasma assisted combustion, 11 airflow control, 12,13 and as a turbulent boundary layer actuator. 14 The ions' acceleration in the electric field and their interaction with the neutral molecules in the ion drift region can be modeled as an external force term (Coulomb force) in the Navier-Stokes equation (NSE).…”

Section: Introductionmentioning

confidence: 99%

Analytical model of electro-hydrodynamic flow in corona discharge

et al. 2018

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We present an analytical model for electro-hydrodynamic flow that describes the relationship between the corona voltage, electric field, and ion charge density. The interaction between the accelerated ions and the neutral gas molecules is modeled as an external body force in the Navier-Stokes equation. The gas flow characteristics are solved from conservation principles with spectral methods. This multiphysics model is shown to match experimental data for a point-to-ring corona configuration, shedding new insights into mass, charge, and momentum transport phenomena, and can be readily implemented in any numerical simulation.

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“…The working principles of EFAs are introduced, and followed by a detailed theory that is developed for the discussions on the Fan-EFA characteristics. The governing equations of particle charging, electrostatic interactions, and fluid mechanics have been presented in pioneers' work [16,17]. A comparison of the velocity characteristics when the EFA is replaced by a rotary fan is also demonstrated (Fan-Fan) at the end of this paper for the purpose of presenting the dissimilarity of the velocity characteristics between the Fan-EFA and Fan-Fan systems.…”

Section: Introductionmentioning

confidence: 99%

“…The moving air in this region obey classic fluid mechanics, where the electric force is considered the body force. The governing equations of particle charging, electrostatic interactions, and fluid mechanics have been presented in pioneers' work [16,17].…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Fluid Accelerator under High‐Speed Free Air Stream

Wen

Lindgren

Mamishev

2016

Contrib. Plasma Phys.

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The electrostatic fluid accelerator (EFA) generates ionic wind with a simple structure that barely obstructs the free air stream or produce excessive noise. This paper presents the velocity characteristics of an EFA under a high speed free air stream to simulate an EFA-powered propulsor. The results show that when the EFA generates identical velocity to the free air stream, the EFA contributes 25% of the resultant velocity. When the EFA is replaced by a rotary fan that generates identical velocity to the free air stream, the fan contributes only 13.4% of the resultant velocity.

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Optimization of wire-rod electrostatic fluid accelerators

Cited by 6 publications

References 16 publications

Analytical model for electrohydrodynamic thrust

Analytical model for electrohydrodynamic thrust

Analytical model of electro-hydrodynamic flow in corona discharge

Electrostatic Fluid Accelerator under High‐Speed Free Air Stream

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