Automatic Welding, 2020, №11



2020 №11 (07)

DOI of Article 10.37434/as2020.11.08

2020 №11 (01)

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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

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