Electrohydrodynamic force produced by a corona discharge between a wire active electrode and several cylinder electrodes – Application to electric propulsion

2015 ◽  
Vol 76 ◽  
pp. 194-200 ◽  
Author(s):  
Eric Moreau ◽  
Nicolas Benard ◽  
Frédéric Alicalapa ◽  
Alexandre Douyère
Keyword(s):  
Corona Discharge ◽  
Electric Propulsion ◽  
Active Electrode ◽  
Electrohydrodynamic Force

scholarly journals Comparison of I-V Curves Between the Experiment of Corona Discharge on Gradient Line-To-Plane (GL-P) Configuration and The Mathematical Approach

2021 ◽  
Vol 3 (2) ◽  
pp. 155-164
Author(s):  
Susilo Hadi ◽  
Asep Yoyo Wardaya ◽  
Zaenul Muhlisin ◽  
Jatmiko Endro Suseno ◽  
Pandji Triadyaksa ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Characteristic Curve ◽  
Mathematical Formulation ◽  
Electrical Current ◽  
Electrical Circuit ◽  
Multiplication Factor ◽  
Mathematical Study ◽  
Active Electrode ◽  
Electrode Shape ◽  
Gradient Line

Research has been conducted on the comparison of the I-V characteristic curve between mathematical study and experiment of the generation of negative DC corona discharge in the Gradient Line-to-Plane (GL-P) electrode configuration. The reason for this research is to calculate the suitability of the corona discharge electrical current between the mathematical and experimental study. The active electrode used has length 2 cm and height 4 cm. This research is conducted with variations in the sharpness angle of the active electrode (θ) 300, 450, and 600 and variations in the distance between the electrodes () 2 cm, 3 cm, and 4 cm. The mathematical formulation of the value of the corona discharge electrical current in the configuration of the GL-P electrode is obtained by using the geometric concept approach, which is the formulation of the capacitance value of the ordinary electrical circuit, with the addition of the multiplication factor value k in the sharp area of the active electrode, because in that area the greatest plasma flow distance is obtained. The value of the multiplication factor  is obtained by fitting the curve between mathematical study and experiments. The I-V curve between the mathematical study and the corona discharge generation experiment has a high degree of similarity with the smallest percentage contacting point of 37.50%.The value of the multiplication factor  is influenced by the sharpness angle of the active electrode shape and the distance between the electrodes.

ACTIVE ELECTRODE SHAPE EFFECT ON THE CORONA DISCHARGE IN AN ELECTROSTATIC PRECIPITATOR\

2017 ◽  
Vol 16 (11) ◽  
pp. 2545-2551
Author(s):  
Nouri Hamou ◽  
Aissou Massinissa ◽  
Aitsaid Hakim ◽  
Zebboudj Youcef
Keyword(s):  
Corona Discharge ◽  
Electrostatic Precipitator ◽  
Shape Effect ◽  
Active Electrode ◽  
Electrode Shape

Electrohydrodynamic force produced by a wire-to-cylinder dc corona discharge in air at atmospheric pressure

2013 ◽  
Vol 46 (47) ◽  
pp. 475204 ◽  
Author(s):  
Eric Moreau ◽  
Nicolas Benard ◽  
Jean-Daniel Lan-Sun-Luk ◽  
Jean-Pierre Chabriat
Keyword(s):  
Corona Discharge ◽  
Atmospheric Pressure ◽  
Electrohydrodynamic Force

Velocity Measurement of EHD Flow Produced by Pin-Multi Concentric Ring Electrodes Generator

2015 ◽  
Vol 771 ◽  
pp. 227-231 ◽  
Author(s):  
Sumariyah ◽  
Kusminarto ◽  
Arief Hermanto ◽  
Pekik Nurwantoro
Keyword(s):  
Stainless Steel ◽  
Corona Discharge ◽  
High Voltage ◽  
Velocity Measurement ◽  
Maximum Velocity ◽  
Ring Electrode ◽  
Hot Wire ◽  
Concentric Ring ◽  
Active Electrode ◽  
Single Ring

Study of EHD flow by using generator corona discharge with electrodes configuration of pin to multi concentric rings (MCR) and pin to single ring (SR) have been curried out. We measured the velocity of EHD flow and determined the comparison of velocity of EHD flow produced by pin to single ring electrodes. The pin needle was made by stainless steel with a length of 50 mm and a tip diameter of 0.14 mm. The multi-ring electrodes constracted by three concentric rings with a metal material connected to each other and each ring has a diameter of 24 mm, 16 mm and 8 mm in width and the same ring thickness is 2 mm and 3 mm. Single ring electrode has a diameter, width and thickness respectively 24 mm , 3 mm and 2 mm. EHD was generated by using a DC high voltage of 10 kV. Pin as an active electrode of corona discharge and concentric rings multi/single ring electrodes as ions collector and passive electrodes. The velocity of EHD flow was measured by a hot-wire anemometer. We found that the velocity of EHD flow with multi-ring concentric electrodes larger than a single ring electrode. The measurement of velocity for two cases of electrodes configuration were limited at the certain voltage due to breackdown and arc phenomena. The maximum velocity of the of EHD flow using a pin-multi rings concentric was 0.7 m/s at a voltage of 6 kV.

scholarly journals Управление обтеканием круглого цилиндра с помощью коронного разряда

2019 ◽  
Vol 89 (9) ◽  
pp. 1352
Author(s):  
М.Е. Ренев ◽  
Ю.Ф. Сафронова ◽  
Ю.К. Стишков
Keyword(s):  
Corona Discharge ◽  
Drag Force ◽  
Aerodynamic Resistance ◽  
Vortex Street ◽  
Active Electrode ◽  
Karman Vortex Street ◽  
Kármán Vortex Street ◽  
Karman Vortex ◽  
The Impact ◽  
Ion Wind

In the paper an influence of ion wind caused by positive corona discharge on a bulk motion near a circular cylinder at Reynolds numbers 2400, 3200 was studied. The geometry of the cylinder-wire electrodes was considered for two positions of the active electrode relative to the cylinder: behind the cylinder and two symmetrical wires above and below the cylinder. A direct numerical simulation of electrohydrodynamic problem was performed. The original unipolar model of the corona discharge was used. The impact of a thin jet of ion wind directed from the active electrode to the cylinder on vortex wake behind the cylinder and the drag force was considered. It was shown that when two active electrodes are placed above and below cylinder, the electric wind prevents the formation of the Karman vortex street and also significantly reduces the aerodynamic resistance of cylinder. When the active electrode is located behind the cylinder, the corona discharge and the ion wind lead to the formation and development of large vortices in the wake of the cylinder, which leads to significant fluctuations in the aerodynamic drag. It was shown that corona discharge significantly changes Karman vortex street properties. Specifically with an increase in the voltage to 30 kV, the vortex detachment frequency decreases by 2.5 times, the size of the vortices and the speed of their rotation dramatically grow. The drag force is quasi-periodic, its average value linearly depends on the applied voltage.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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