In-atmosphere electrohydrodynamic propulsion aircraft with wireless supply onboard

Khomich, V. Yu.; Ребров, И. Е.

doi:10.1016/j.elstat.2018.07.005

Cited by 34 publications

(19 citation statements)

References 42 publications

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“…Thrust to power ratio was found to be dependent on electrode distance and the potential difference between the electrodes. Similar results were observed for an ionocraft with a wireless power supply onboard and transmitted power up to 100 W to ionocraft at the voltages up to 12 kV [28]. The EHD propulsion can be utilized for UAV propulsion; the experimentally measured maximum thrust density of 15 N.m −3 was reported recently [29].…”

Section: Corona Discharge Driven Flowsupporting

confidence: 76%

A laser-microfabricated electrohydrodynamic thruster for centimeter-scale aerial robots

et al. 2020

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To date, insect scale robots capable of controlled flight have used flapping-wings for generating lift, but this requires a complex and failure-prone mechanism. A simpler alternative is electrohydrodynamic (EHD) thrust, which requires no moving mechanical parts. In EHD, corona discharge generates a flow of ions in an electric field between two electrodes; the high-velocity ions transfer their kinetic energy to neutral air molecules through collisions, accelerating the gas and creating thrust. We introduce a fabrication process for EHD thruster based on 355 nm laser micromachining, which potentially allows for greater materials selection, such as fiber-based composites, than is possible with semiconductor-based lithographic processing. Our four-thruster device measures 1.8 × 2.5 cm and is composed of steel emitters and a lightweight carbon fiber mesh. We measured the electrical current and thrust of each thruster of our four-thruster design, showing agreement with the Townsend relation. The peak thrust of our device, at 5.2 kV, was measured to be 3.03 times its 37 mg (363.0 μN) mass using a precision balance. In free flight, we demonstrated liftoff at 4.6 kV.

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Section: Corona Discharge Driven Flowsupporting

confidence: 76%

A laser-microfabricated electrohydrodynamic thruster for centimeter-scale aerial robots

et al. 2020

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“…Ionic wind is of interest in distinct applications such as electrostatic precipitors [1,2], aero-electro-dynamic [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], gas and ionic pumps [20][21][22][23][24][25][26], particle analyzer [27,28], miniaturized heat cooler [29][30][31][32][33] and xerography, i.e. electro-photography.…”

Section: Introductionmentioning

confidence: 99%

Multi-inception patterns of emitter array/collector systems in DC corona discharge

Lemetayer¹,

Marion²,

Fabre³

et al. 2022

J. Phys. D: Appl. Phys.

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Multiple emitters systems have been previously used so as to increase charge density in the drift region, many times without producing sensible increment neither in total current nor ionic wind. This contribution focuses on analyzing the detailed physics behind this failure, that is named "multiple emitters un-scalability". It is established that multiple emitters un-scalability is related to the inability of multiple corona discharge inceptions when increasing the emitter number and/or density. This confirms recent findings that corona discharge inception is shielded by electro-static interactions between emitters. This contribution demonstrates that this shielding can be balanced by emitter/collector electrostatic interactions depending on the considered configuration. For sufficiently close collector-emitter distances, ignition starts at the array center, whereas, on the contrary, when the collector is distant, the ignition not only starts at the array's periphery but might also be limited there.It is also demonstrated that emitter/emitter electrostatic interactions can be balanced by emitter/collector ones, depending of their chosen configuration. This lead to a variety of multi-inception patterns, the condition of which are analyzed. Intermediate configurations for which the collector is neither sufficiently close nor distant from the emitter array center provide a variety of multi-inception patterns that are hereby analyzed. Combining finite element computations of multi-inception drift-diffusion modeling with experimental measurements, provides a coherent picture explaining why multiple emitters sources systems do not lead to full ignition, and also exhibit conditions for which it does, leading to multiple emitters scalable systems.

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“…More recently, Gilmore showed that EHD propulsion could be viable to drive small aircraft [20], which led to the demonstration of flying fixed-wing electro-aerodynamic (EAD) aircraft [21]. Similarly, the EHD thrusters have also been proposed as a propulsion method for small-scale ionocrafts [22][23][24].…”

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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In-atmosphere electrohydrodynamic propulsion aircraft with wireless supply onboard

Cited by 34 publications

References 42 publications

A laser-microfabricated electrohydrodynamic thruster for centimeter-scale aerial robots

A laser-microfabricated electrohydrodynamic thruster for centimeter-scale aerial robots

Multi-inception patterns of emitter array/collector systems in DC corona discharge

Analytical model for electrohydrodynamic thrust

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