Advertisement

A study of pulsations in a plasmatron with a self-stabilizing ARC

  • A. S. An'shakov
  • G. Yu. Dautov
  • G. M. Mustafin
  • A. P. Petrov
Article

Abstract

Shunting is one of the basic processes which determine the properties of the arc and heated gas stream in a vortex plasmatron. Much attention has, therefore, been given recently to the character of the shunting mechanism and of the associated pulsations. The relationship between fluctuations of the flux brightness at the plasmatron outlet and the arc voltage is described in [1]. Paper [2] contains data on the effect of gas consumption and current on shunting frequency; it also shows the possibility of coexistence of several anode spots in an argon arc. The authors of [3] investigated the effect of electrode channel and electrode material polarities on arc voltage pulsations. In the present study we obtain voltage, current, and brightness distribution functions and reproduce oscillograms of these quantities and also of the current through the anode cross sections. We use various methods to prove the coexistence of several anode spots and discuss the effect of the intrinsic magnetic field of the arc on its behavior.

Keywords

Vortex Argon Industrial Mathematic Electrode Material Voltage Pulsation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notation

I, U

time-average values of the arc current and voltage

In

time-average current through the n-th anode cross section

Int

instantaneous value of the variable component of the current through the n-th anode cross section

Iz

time-average current per unit length of the anode

It, Ut, Bt

instantaneous values of the variable components of the current, voltage, and jet brightness

Is, Us, bs

instantaneous values of the current, voltage, and jet brightness

fu,fi,fb

voltage, current, and jet brightness distribution functions

G

gas consumption (flow rate) through the arc chamber

d

inside diameter of the anode

t

time

z

coordinate along the arc chamber axis (whose origin lies at the cathode end face)

vz

time-average frequency of visitation of a unit anode length by an arc spot

vn

time-average frequency of visitation of the n-th anode cross section by an arc spot

i, v

distribution functions of the quantities Iz andvz over the length of the anode

z0i, z0v

values of z corresponding to the maxima of i andv

j

current density in the arc column

H

intensity of the magnetic self-field of the arc

s

cross-sectional area of the arc column

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. R. Jorden and L. A. King, “The nature of fluctuations present in dc plasma jets in argon and nitrogen,” Brit. J. Appl. Phys., vol. 16, no. 4, 1965.Google Scholar
  2. 2.
    J. Moritz, W. Neumann, and K. Rademacher, “Über die Bewegung des Bogenansatzes an Plasmastrahl-Hohlanoden,” Beitr. Plasma Phys., vol. 5, no. 4, 1965.Google Scholar
  3. 3.
    V. O. German and M. G. Morozov, “A dc plasmatron and some results obtained in investigating its operation,” Teplofizika vysokikh temperatur, vol. 2, no. 5, 1965.Google Scholar
  4. 4.
    G. Yu. Dautov and M. F. Zhukov, “Some generalizations of studies of electric arcs, “ PMTF [Journal of Applied Mechanics and Technical Physics], no. 2, 1965.Google Scholar
  5. 5.
    A. M. Trokhan, “A photographic study of pulsations in airstabilized plasmatrons,” PMTF, no. 2, 1964.Google Scholar
  6. 6.
    G. Yu. Dautov, Yu. S. Dudnikov, M. F. Zhukov, and M. I. Sazonov, “Distribution of the potential along the arc in a vortex plasmatron, “ PMTF [Journal of Applied Mechanics and Technical Physics] no. 5, 1965.Google Scholar
  7. 7.
    O. B. Bron, Electric Arcs in Control Apparatus [in Russian], Gosenergoizdat, 1954.Google Scholar

Copyright information

© The Faraday Press, Inc. 1971

Authors and Affiliations

  • A. S. An'shakov
    • 1
  • G. Yu. Dautov
    • 1
  • G. M. Mustafin
    • 1
  • A. P. Petrov
    • 1
  1. 1.Novosibirsk

Personalised recommendations