The Paton Welding Journal, 2000, №12

2000 №12 (07)

2000 №12 (09)

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The Paton Welding Journal, 2000, #12, 51-54 pages

Modelling of heating and movement of particles in arc plasma at supercritical pressure gradient

S.V. Petrov¹, A.G. Saakov¹, O.L. Kotlyarov², V.P. Yatsenko²

¹RPC «TOPAS», Kyiv, Ukraine
²Institute for General Power Engineering, NASU, Kyiv, Ukraine

Abstract
Results of calculation of the electric arc burning under conditions of a supercritical pressure gradient in a blocked nozzle and with dispersed particles injected in it are given. It is shown that a plasmatron based on this principle is an efficient means for heating and acceleration of the spraying powder. Molten particles which are not subjected to splitting in flight leave the arc plasma in such a plasmatron at a velocity of about 1000 m/s, which provides a substantial improvement in properties of the sprayed coatings.
Keywords: mathematical model, plasmatron arc, plasma flow, spraying powder, particle size, supersonic velocity

References

1. Petrov, S.V., Karp, I.P. (1993) Air-gas plasma spraying. Kyiv: Naukova Dumka.
2. Stornin, L.E., Shraiber, A.A. (1994) Multiphase flows of gas with particles. Moscow: Mashinostroyeniye.
3. Engelsht, V.S., Gurovich, V.Ts., Desyatkov, G.A. et al. (1990) Theory of the electric arc column. Novosibirsk: Nauka.
4. Lukianov, G.A. (1985) Supersonic plasma jets. Leningrad: Mashinostroyeniye.
5. Donskoj, A.V., Klubnikin, V.S. (1979) Electric plasma processes and units in machine building. Leningrad: M ashinostroyeniye.
6. Nigmatulin, R.I. (1978) Fundamentals of mechanics of heterogeneous media. Moscow: Nauka.
7. Zinoviev, V.E. (1989) Thermal-physical properties of metals at high temperatures. Handbook. Moscow: Metallurgia.

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Suggested Citation

S.V. Petrov, A.G. Saakov, O.L. Kotlyarov, V.P. Yatsenko (2000) Modelling of heating and movement of particles in arc plasma at supercritical pressure gradient. The Paton Welding J., 12, no data.

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