Abstract
Results are presented of an experimental investigation of the process of energy transfer to the anode of an arc in application to plasma-mechanical treatment of components.
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Abbreviations
- Qy :
-
energy introduced per unit mass of the layer being cut, W/kg
- Q:
-
integral energy flux in the anode, W
- I:
-
arc current, A
- L:
-
spacing between the plasmotron nozzle exit and the component, m
- h:
-
spacing between the plasmotron nozzle exist and the cathode, m
- d:
-
plasmotron nozzle diameter, m
- G:
-
gas consumption, kg/sec
- q:
-
energy flux density in the anode spot, W/cm2
- r:
-
spacing from the center of the anode spot to the point at which the energy flux density is calculated, cm
- qm :
-
energy flux density at the center of the anode spot, W/cm2
- kq :
-
concentration coefficient, cm−2
- So :
-
degree of heat propagation, m
- α:
-
thermal diffusivity factor, m2/sec
- τ:
-
time, sec
- k:
-
spacing between the plasmotron and the cutter, m
- v:
-
cutting rate, m/sec
- η:
-
coefficient of energy transmission to the anode
- N:
-
electrical power of the arc, W
Literature cited
A. N. Strozhkov, Sh. L. Tesler, S. P. Shabanov, et al., Treating Materials Difficult to Treat with Heat by Cutting [in Russian], Mashinostroenie, Moscow (1977).
V. V. Tsotskhadze, “Productive treatment of preheated heat-resistant alloys,” in: Highly Productive Cutting in Machine Construction [in Russian], Mashinostroenie, Moscow (1966), pp. 71–75.
P. F. Bulanyi and S. P. Polyakov, “Optimization of metal heating by an electrical arc,” Inzh.-Fiz. Zh.,39, No. 4, 687–691 (1980).
A. V. Nikolaev, “On a cascade arc in plasma installations,” Avtomatich. Svarka, No. 6, 4–7 (1971).
P. F. Bulanyi and S. P. Polyakov, “On the question of an experimental investigation of the heat flux and electrical current densities on the anode of a high-current stabilized arc,” Teplofiz. Vys. Temp.,19, No. 3, 497–501 (1981).
P. F. Bulanyi and S. P. Polyakov, “Investigation and generalization of the specific heat flux and current density in the anode spot of a high-current arc at atmospheric pressure,” Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Tekh. Nauk, No. 3, 55–57 (1980).
A. V. Lykov, Theory of Heat Conduction [in Russian], Vysshaya Shkola, Moscow (1967).
P. F. Bulanyi, S. P. Polyakov, and M. G. Rozenberg, “Investigation and generalization of the volt-ampere characteristics of direct-action plasmotrons,” Inzh.-Fiz. Zh.,41, No. 2, 334–338 (1981).
S. V. Dresvin (ed.), Physics and Engineering of a Low-Temperature Plasma [in Russian], Atomizdat, Moscow (1972).
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 47, No. 1, pp. 138–143, July, 1984.
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Polyakov, S.P., Bulanyi, P.F., Pleshivenko, G.D. et al. Optimization of metal heating in plasma-mechanical treatment. Journal of Engineering Physics 47, 852–856 (1984). https://doi.org/10.1007/BF00832606
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DOI: https://doi.org/10.1007/BF00832606