scholarly journals Hydrocarbon flame in non-stationary electric field

2018 ◽  
Author(s):  
V. S. Venediktov ◽  
P. K. Tretyakov ◽  
A. V. Tupikin
Keyword(s):  
Electric Field ◽  
Hydrocarbon Flame ◽  
Stationary Electric Field

MEASUREMENT OF LEAKAGE CURRENTS AND QUASI-STATIONARY ELECTRIC FIELD IN THE SURFACE AREA OF THE ISS RS IN THE EARTH'S IONOSPHERE

2021 ◽  
pp. 5-21
Author(s):  
Yury V. LISAKOV ◽  
Olga V. LAPSHINOVA ◽  
Nikolay M. PUSHKIN ◽  
Viktor P. KONOSHENKO ◽  
Nikolay V. MATVEEV ◽  
...  
Keyword(s):  
Electric Field ◽  
Spatial Configuration ◽  
Flow Direction ◽  
Electrical Measurements ◽  
Leakage Currents ◽  
Current Leakage ◽  
Stationary Electric Field ◽  
Charged Component ◽  
Stage 1 ◽  
Orbital Data

The paper presents the results of analysis of electrical measurements performed in the space experiment "Impulse (stage 1)" on the Service module of the ISS RS. This experiment investigated the effects of the interaction of the charged component of the ionosphere to the surface of large KA, which is the ISS. This paper analyses the measurement of quasi-stationary electric field and current leakage, was, respectively, sensors of the vibration type and flat probes from the Complex control electrophysical parameters (CCEP), developed by SPJ MT. To study the dependence of measurements from the ionosphere flow direction to the surface of the ISS RS was installed two sets of sensors with the direction of the angle of "visibility" in the Nadir (towards the Earth) and to "satellite footprint " (against the velocity vector of the ISS). Carried out analysis of common regularities measurements depending on the sun-shadow environment on orbit ISS motions and depending on current geophysical dynamics of the ionosphere. Massive the measurements including more than 170 telemetric sessions were analyzed. More than 11000 hours of measurements current of leakage (or runoff current) and measurements of quasi-stationary electric field with discretization 1s and UT binding to each point were analysed. The data measurements, geophysical and orbital data were collected in an electronic album. It is shown that experimental data correlate with the crossing time of the ISS boundaries known geophysical structures: the noon Meridian, the Main ionospheric failure (MIF), the boundaries diffuse intrusion (BDI), the Equatorial Geomagnetic anomaly (EA). In this regard, despite the specificity of the ISS (the spacecraft super big sizes, the most complex spatial configuration) similar measurements, nevertheless, are quite suitable for monitoring researches of some features of an ionosphere at the level of F2 layer with a temporary scale from 1s and can be used for more detailed study of the geophysical structures and related effects in the ionosphere. In addition, the results obtained can be used for the analysis of disturbances of electromagnetic conditions near the surface of the ISS RS, for monitoring potential and currents of leakage on the surface of the ISS. Keywords: electrophysical measurements, sensors of the vibration type, flat probes, electric field, current leakage, geophysical structure, ionosphere

Soot Extraction from a Laminar Hydrocarbon Flame by Means of an Electric Field

2005 ◽  
Vol 40 (2) ◽  
pp. 172-178 ◽  
Author(s):  
A. B. Vatazhin ◽  
D. A. Golentsov ◽  
V. A. Likhter
Keyword(s):  
Electric Field ◽  
Hydrocarbon Flame

scholarly journals Diffusion-drift model of ion migration over interstitial sites of a two-dimensional lattice

2019 ◽  
Vol 55 (3) ◽  
pp. 355-365
Author(s):  
N. A. Poklonski ◽  
A. O. Bury ◽  
N. G. Abrashina-Zhadaeva ◽  
S. A. Vyrko
Keyword(s):  
Electric Field ◽  
Ion Current ◽  
Finite Difference Approximation ◽  
Square Lattice ◽  
Difference Approximation ◽  
Water Molecules ◽  
Ion Migration ◽  
Drift Model ◽  
Stationary Electric Field ◽  
Electric Potentials

An analytical and numerical modeling of the process of obtaining hydroxyl radicals OH0 and atomic hydrogen H0 from water molecules on a square lattice based on electrical neutralization of ions OH− on an anode and ions H+ on a cathode is conducted. The numerical solution of a system of equations describing a stationary migration of ions H+ and OH− over the interstitial sites of a square lattice located in an external electric field is considered. The ions H+ and OH− in the interstitial sites of a square lattice are generated as a result of dissociation of a water molecule under the action of external electromagnetic radiation and external constant (stationary) electric field. It is assumed that anode and cathode are unlimited ion sinks. The problem is solved using the finite difference approximation for the initial system of differential equations with the construction of an iterative process due to the nonlinearity of the constituent equations. It is shown by using calculation that the dependence of the ion current on a difference of electric potentials between anode and cathode is sublinear.

scholarly journals Эффект фотовращения Квинке

2018 ◽  
Vol 44 (16) ◽  
pp. 27
Author(s):  
А.И. Грачев
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
Spherical Particle ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Continuous Irradiation ◽  
Stationary Electric Field ◽  
Quincke Rotation

AbstractImplementation of the well-known phenomenon of Quincke rotation is proposed, which may be called the “photoinduced Quincke rotation (PIQR) effect.” The PIQR effect is based on the previously discovered phenomenon of rotation of a spherical particle in a stationary electric field under continuous irradiation inducing an electric dipole moment in the particle.

Modeling the electric field at interfaces and surfaces in high-voltage cable systems

2020 ◽  
Vol 39 (5) ◽  
pp. 1099-1111 ◽  
Author(s):  
Christoph Jörgens ◽  
Markus Clemens
Keyword(s):  
Electric Field ◽  
Electric Conductivity ◽  
High Voltage ◽  
Analytic Description ◽  
Time Varying ◽  
Content Type ◽  
Field Stress ◽  
Space Charges ◽  
Stationary Electric Field ◽  
Cable Systems

Purpose In high-voltage direct current (HVDC) cable systems, space charges accumulate because of the constant applied voltage and the nonlinear electric conductivity of the insulating material. The change in the charge distribution results in a slowly time-varying electric field. Space charges accumulate within the insulation bulk and at interfaces. With an operation time of several years of HVDC systems, typically the stationary electric field is of interest. The purpose of this study is to investigate the influence of interfaces on the stationary electric field stress and space charge density. Design/methodology/approach An analytic description of the stationary electric field inside cable insulation is developed and numerical simulations of a cable joint geometry are applied, considering spatial variations of the conductivity in the vicinity of the electrodes and interfaces. Findings With increasing conductivity values toward the electrodes, the resulting field stress decreases, whereas a decreasing conductivity results in an increasing electric field. The increased electric field may cause partial discharge, resulting in accelerated aging of the insulation material. Thus, interfaces and surfaces are characterized as critical areas for the reliability of HVDC cable systems. Research limitations/implications This study is restricted to stationary electric field and temperature distributions. The electric field variations during a polarity reversal or a time-varying temperature may result in an increased electric conductivity and electric field at interfaces and surfaces. Originality/value An analytical description of the electric field, considering surface effects, is developed. The used conductivity model is applicable for cable and cable-joint insulations, where homo- and hetero-charge effects are simulated. These simulations compare well against measurements.

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