Splitting over physical processes as applied to the construction of a numerical method for solving the system of kinetic equations governing a hall thruster rarefied plasma jet

2012 ◽  
Vol 52 (10) ◽  
pp. 1452-1471 ◽  
Author(s):  
A. S. Arkhipov ◽  
A. M. Bishaev
Keyword(s):  
Numerical Method ◽  
Kinetic Equations ◽  
Plasma Jet ◽  
Hall Thruster ◽  
Physical Processes

scholarly journals Background Pressure Effects on the Performance of a 20 kW Magnetically Shielded Hall Thruster Operating in Various Configurations

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 69
Author(s):  
Antonio Piragino ◽  
Farbod Faraji ◽  
Maryam Reza ◽  
Eugenio Ferrato ◽  
Annalisa Piraino ◽  
...  
Keyword(s):  
Mass Flow ◽  
Discharge Current ◽  
Pressure Effects ◽  
Hall Thruster ◽  
Physical Processes ◽  
Linear Behavior ◽  
Mass Flow Rates ◽  
Anode Mass ◽  
Lower Background ◽  
Operating Regimes

The paper reports the characterization results of a 20 kW-class magnetically shielded Hall thruster in three different configurations and operating with a centrally mounted cathode. The characterization was carried out at two different pumping speeds in SITAEL’s IV10 vacuum chamber, resulting in two different background pressure levels for each tested operating point. A linear behavior of discharge current and thrust values versus the anode mass flow rate was noticed for both pumping speeds levels and for all the three configurations. In addition, the thrust and discharge current values were always found to be lower at lower background pressure levels. From the performance levels, a preliminary estimate of the ingested mass flow rates was performed, and the values were then compared to a recently developed background flow model. The results suggested that, for this thruster and in the tested operating regimes, the change in performance due to background pressure could be ascribed not only to the ingestion of external mass flow coming from the chamber but also to other physical processes caused by the flux of residual background neutrals.

scholarly journals Numerical Method for Fuel Distribution Downstream of the Emulsifying Channel Injector

1985 ◽  
Author(s):  
Liu Bing ◽  
Wang Hong-Ji
Keyword(s):  
Differential Equation ◽  
Numerical Method ◽  
Calculation Model ◽  
Experimental Results ◽  
Two Dimensional ◽  
Physical Processes ◽  
Mixture Formation ◽  
Fuel Distribution ◽  
Good Agreement

Based upon experimental results, the physical processes of fuel-air mixture formation downstream of the emulsifying channel injector (ECI) have been studied and a calculation model for predicting fuel distribution downstream of ECI has been proposed in this paper. The two-dimensional differential equation of diffusion is solved by numerical method and the fuel distribution downstream of ECI is calculated. The calculated values are in good agreement with the experimental results.

ELECTRICAL AND OPTICAL STUDIES OF THE ARGON PLASMA JET

1963 ◽  
Vol 41 (9) ◽  
pp. 1405-1419 ◽  
Author(s):  
M. D. Watson ◽  
H. I. S. Ferguson ◽  
R. W. Nicholls
Keyword(s):  
Argon Plasma ◽  
Dissociative Recombination ◽  
Plasma Jet ◽  
Ambipolar Diffusion ◽  
Recombination Coefficient ◽  
Physical Processes ◽  
Optical Studies ◽  
Degree Of Ionization ◽  
Preliminary Study ◽  
Argon Plasma Jet

A preliminary study has been made of the physical processes occurring in an argon plasma jet flowing at Mach 2.5. Axial electron and ion temperatures and densities were measured as functions of distance along the jet, using spectroscopic and electrical probe techniques. Estimates were also made of the degree of ionization, the electron–ion recombination coefficient, and the ambipolar diffusion coefficient. It was found that electron temperatures (~4000° K) were about twice as large as the effective rotational temperatures of N2 molecules (~1500° K) and thus of ion temperatures. Electron densities were ~1012 cm−3. The degree of ionization was ~6 × 10−4. The dominant mechanism for deionization was found to be dissociative recombination (between electrons and A2+ ions) over the first 8 cm of the jet, after which ambipolar diffusion appeared to become important.

scholarly journals ALUMINOSILICATE MICROSPHERE PRODUCTION

2019 ◽  
pp. 134-139
Author(s):  
V. V. Shekhovtsov ◽  
O. G. Volokitin ◽  
R. E. Gafarov ◽  
M. A. Semenovykh
Keyword(s):  
Production Process ◽  
Energy Efficient ◽  
Building Materials ◽  
Plasma Jet ◽  
Physical Processes ◽  
High Quality ◽  
Plasma Energy ◽  
Optimum Parameters ◽  
New Energy ◽  
Gas Control

The development of new energy-efficient methods in the production of building materials is always important. One of such materials is microspheres which can be obtained by plasma energy. A study of physical processes during the formation of microsphere density determines the optimum parameters for the production of high-quality building materials. The article is devoted to production process of microspheres based on aluminosilicates. The plasma jet modes and their effect on the morphology of generated microspheres are investigated. It is shown that microspheres with different morphology can be produced by using a plasma gas control.  

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