Creation of Model and Calculation of Thermal Processes in the Ring Graphite Electrode of the Plasmatron

  • Authors

    • Ramil T. Nasibullin
    • Almaz Sh. Sadriev
    • Ramil Sh. Sadriev
    • Lenar R. Sarimov
    2018-12-09
    https://doi.org/10.14419/ijet.v7i4.36.24950
  • graphite electrode, ring electrode, thermal processes, thermal conductivity, electric arc, plasmatron, thermal characteristics.

  • Abstract

    This paper presents the theoretical and experimental material obtained in the study of the erosion and thermal state of the ring graphite electrode for a plasmatron. Thermal processes in graphite electrodes of plasmatrons are quite complex and multifaceted. A mathematical model of thermal processes that occur at the ring electrodes of plasmatrones has been developed. The mathematical model is based on the differential heat conduction equation for a ring electrode in cylindrical coordinates. With the use of this mathematical model, the inverse problem of heat conduction is solved: determination of the regularities of the heat exchange process by the temperatures of individual points on a solid surface. An experimental study of the temperature distribution at the end of the electrode and along the length of the electrode was carried out. Experiments have shown that the temperature on the side surfaces drops sharply towards the cold end of the electrode. When reducing the length of the electrode, the maximum temperature at the end decreases, and the temperature on the inner and outer edges of the electrode increases slightly. The most significant factors determining the temperature field at the end of the ring electrode are the power and size of the heat source. Comparison of the results of experimental studies and mathematical modeling showed a match with an acceptable degree of accuracy.

     

     

     

  • References

    1. [1] Physical gas dynamics and heat transfer. Executive editor A.S. Predvoditelev - M: Science, 1968. - 256 p.

      [2] Zhukov M.F., Anshakov A.S., Dandaron G.-N.B. // Electrode processes and electrode erosion. - Novosibirsk: IT SOAN USSR, 1977.- P.61-84.

      [3] Haidar J., Farmer AJD Large-free-burning arcs //J.Phys.D: Appl. Phys.-1994.-V.27.-p.555-560.

      [4] Zhou X., Heberlein J., Pfender E. Theoretical study of factors influencing arc erosion of cathode.// Proc. Of the 38 th Holm Conference on Electric Contacts, 1992.

      [5] Goldfarb V.M., Dresvin S.V. Optical studies of the distribution of temperature and electron concentration in argon plasma.// TVT, 1965. - T.Z.-â„–6.

      [6] Hsu К.С., Pfender Е. Analysis of the cathode region of a free-burning high intensity argon arc. //J.Appl.Phys.-1983.-V.54, №7.-p.3818-3824.

      [7] Osovets SV., Pashatsky N.V. Analytical and experimental studies of the electrodes of a multi-arc plasmatron // Moscow State Engineering Physics Institute (Technical University), Department â„–1. - Ozersk, Chelyabinsk region, 1995. - 16 p. - deposited in VINITI. 199508/04/95. No. 2394 - B95.

      [8] Masao Ushio, Ding Fan, Manabu Tanaka.A method of estimating the thermionic arc cathodes. // j. Phys.D: Appl. Phys.-1994.-p.561-566.

      [9] Gavryushenko BC, Pustogarov A.V. Investigation of plasmatron electrodes // Near-electrode processes and erosion of plasmatron electrodes. - Novosibirsk: ITF, 1977.Pp. 85-122.

      [10] M.Cao, M.I.Boulos, P.Proulx. Mathematical modeling of high-power transferred arcs.//J. App. Phys.-1994.-V76.-p.7757-7767

      [11] Rusanov V.D. Modern methods of plasma research. - M. : Gosatomizdat, 1962. - 184 p.

      [12] Morozov A.I. Introduction to plasma dynamics. - M. : Science-Fizmatlit, 2008. - 614 p.

      [13] Zazhigaev L.S., Kishyan A.A., Romanikov Yu.I. Methods of planning and processing the results of a physical experiment. - M. : Atomizdat, 1978. - 232 p.

      [14] Salyanov F.A. Fundamentals of low-temperature plasma physics, plasma apparatus and technology. - M. : Science-Fizmatlit, 1997. - 240 p.

      [15] Low-temperature plasma. Proceedings of the International Symposium on the properties and applications of low-temperature plasma at the XX International Congress on Theoretical and Applied Chemistry. - M. ; Mir publishing house, 1967. - 631 p.

      [16] R.N. Abdrakhmanov, R.T. Nasibullin, R.Sh. Sadriev, L.R. Sarimov. Calculation of the parameters of an electric arc in installations for plasma cutting and welding of metals. Bulletin of A.N. Tupolev KSTUâ€, Kazan, 2008. - â„–1., P. 22-24

      [17] Galeev R.R., Nasibullin R.T., Sadriev A.Sh., Sadriev R.Sh. Technology of treatment of building materials with the plasma torch / Journal of Physics: Conference Series, Vol. 830, 2017, article number 012084

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  • How to Cite

    T. Nasibullin, R., Sh. Sadriev, A., Sh. Sadriev, R., & R. Sarimov, L. (2018). Creation of Model and Calculation of Thermal Processes in the Ring Graphite Electrode of the Plasmatron. International Journal of Engineering & Technology, 7(4.36), 1046-1049. https://doi.org/10.14419/ijet.v7i4.36.24950

    Received date: 2018-12-28

    Accepted date: 2018-12-28

    Published date: 2018-12-09