The Paton Welding Journal, 2020, #11, 36-40 pages
Diagnostics of hydrogen-oxygen plasma jet for application in thermal spraying
Yu.S. Popil1, V.M. Korzh1, V.Ya. Chernyak2 and Ye.A. Zakharov1
NTUU «Igor Sikorsky Kyiv Polytechnic Institute»
37 Peremohy Prosp., Kyiv, Ukraine, E-mail: Popil_kpi@ukr.net
Taras Shevchenko National University of Kyiv
4g Akademik Glushkov Prosp., 03187, Kyiv, Ukraine
The problem of obtaining a low-temperature plasma jet, where the plasma-forming gas is a hydrogen-oxygen mixture
produced by electrolysis-water generators, was 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. In the course of diagnosing the plasma jet, the distribution of temperature, velocity and effective
thermal power depending on the nature of the jet flow was determined. It was determined that the sizes of the active
zone of the plasma jet can be 1.4 times larger at a laminar nature of the flow than at a turbulent one. The maximum
temperature is observed in the arc part of the plasmatron and amounts to 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 Table, 2 Figures.
hydrogen-oxygen plasma jet, laminar, turbulent nature of flow, sizes of active zone of the jet, plasma
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