Eng
Ukr
Rus
Print

2020 №11 (07) DOI of Article
10.37434/as2020.11.08
2020 №11 (01)

Automatic Welding 2020 #11
Avtomaticheskaya Svarka (Automatic Welding), #11, 2020, pp. 41-45

Diagnostics of hydrogen-oxygen plasma jet for application in gas thermal spraying

Yu.S. Popil1, V.M. Korzh1, V.Ya. Chernyak2, Ye.A. Zakharov1
1NTU «Igor Sikorsky Kyiv Polytechnic Institute». 37 Peremohy Ave., 03056, Kyiv, Ukraine. Е-mail: Popill_kpi@ukr.net
2Taras Shevchenko National University of Kyiv. 64/13, Volodymyrska Str., 01601, Kyiv, Ukraine,

The issue of obtaining a low-temperature plasma jet, where the plasma-forming gas is a hydrogen-oxygen mixture produced by electrolysis-water generators, is considered. The aim of the work is to determine the size of the active zone of the jet, along the length of which the melting and heating of the particle takes place, and to control it by changing the nature of the flow. By diagnosing the plasma jet, the distribution of temperature, velocity, and effective thermal power depending on the nature of the jet leakage was determined. It was determined that the size of the active zone of the plasma jet is 1.4 times larger in the laminar nature of the flow than in the turbulent one. The maximum temperature is in the arc part of the plasmatron and is 8400 ± 1000 K, in the jet of hydrogen-oxygen plasma the average temperature is 5000 ± 500 K. Taking into account the results of the diagnostics, the material for plasma spraying and distance can be chosen. 19 Ref., 1 Tabl., 2 Fig.
Keywords: hydrogen-oxygen plasma jet, laminar, turbulent nature of flow, sizes of active zone of the jet, plasma spraying


Received: 12.10.2020

References

1. Nikolaev, G.A., Olshansky, N.A. (1975) Special methods of welding. Moscow, Mashinostroenie [in Russian].
2. Borisov, Yu.S. (1987) Thermal coatings from powder materials: Refer. book. Kiev, Naukova Dumka [in Russian].
3. Korzh, V.M., Popil, Yu.S. (2010) Oxyhydrogen treatment of metals. Kiev, Ekotekhnologiya [in Russian].
4. By data of Companies LLC Multiplaz http://www.multiplaz. ru/ OJSC Elion, Gorynych https://as-pp.ru/gorynych; http:// aspromt.ru/mppk-gorynych [in Russian].
5. Frolov, V.V. (1954) Physicochemical processes in welding arc. Moscow, Mashgiz [in Russian].
6. Dudko, D.Ya., Emets, Yu.P., Repa, I.I. (1981) Composition and electrophysical parameters of oxyhydrogen plasma. Teplofizika Vysokikh Temperatur, 19, 4, 697–701 [in Russian].
7. Dautov, G.Yu., Uryukov, B.A. et al. (2004) Generation of low-temperature plasma and plasma technologies. In: Problems and Prospects. Novosibirsk, Nauka, 105–145 [in Russian].
8. Vargaftik, N.B. (1963) Reference book on thermophysical properties of gases and fluids. Moscow, Fizmatgiz [in Russian].
9. (1959) Browning. Plasma – a substitute for the oxy-fuel flame. Welding J., 9, 38.
10. Vasiliev, K.V., Isachenko, A.A. (1961) On application of plasma heating in welding processes. Trudy VNIIAVTOGEN, Issue 8 [in Russian].
11. Zhukov, M.F., Smolyakov, V.Ya., Uryukov, B.A. (1973) Electric arc heaters of gas (plasmatrons). Moscow, Nauka [in Russian].
12. Korzh, V.M., Popil, Yu.S., Popil, N.Yu., Moskalenko, D.B. (2015) Method of producing of oxyhydrogen plasma jet. Ukraine Pat. 107568, fill. 31.12.2015; publ. 10.06.2016; Int. Cl. В23К 10/02, В23К 101/00 [in Ukrainian].
13. Paton, B.E., Gvozdetsky, V.S., Dudko, D.A. et al. (1979) Microplasma welding. Kiev, Naukova Dumka [in Russian].
14. Rykalin, N.N. (1985) High-temperature technological processes. Moscow, Nauka [in Russian].
15. Abramovich, G.N. (1969) Applied gas dynamics. Moscow, Fiz-Mat. Literatura [in Russian].
16. (1977) Optical pyrometer LOP-72: Certificate. Kharkov, Oblgrafizdat [in Russian].
17. Laux, C.O., Spence, T.G., Kruger, C.H., Zare, R.N. (2003) Optical diagnostics of atmospheric pressure air plasma. Plasma Sources Sci. Technol., 12, 2, 125-138. https://doi.org/10.1088/0963-0252/12/2/301
18. (1985) Electron-excited molecules in nonequilibrium plasma. Trudy FIAN. Moscow, Nauka [in Russian].
19. Pearse, R.W.B, Gaydon, A.G. (1976) The identification of molecular spectra. John Wiley & Sons, Inc., NewYork. https://doi.org/10.1007/978-94-009-5758-9

Advertising in this issue: