NDLI: Technique of Formation of an Axisymmetric Heterogeneous Flow During Thermal Spraying of Powder Materials

Content Provider	Springer Nature Link
Author	Kuz’min, V. I. Mikhal’chenko, A. A. Kovalev, O. B. Kartaev, E. V. Rudenskaya, N. A.
Copyright Year	2011
Abstract	The paper presents an investigation of a unit of annular injection of powder materials into a thermal plasma flow. The unit is designed for the electric-arc direct-current plasma torch with a sectioned inter-electrode insert up to 100 kW, which was developed earlier. Energy characteristics (thermal efficiency and thermal power of the plasma jet) and spectra of plasma torch current and voltage fluctuations are described. The characteristics of the radial temperature distribution in the plasma jet in the annular and point powder injection cases are compared. A multi-channel spectrometer with a photo-diode array was implemented for the measurements. It is shown that, in contrast to point injection of powder particles, which is carried out across the jet on the nozzle exit, distributed annular injection with gas-dynamic focusing provides a dense axisymmetric heterogeneous flow, in which almost all particles pass through a high-temperature and high-speed area near the plasma jet axis.
Starting Page	159
Ending Page	168
Page Count	10
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	21
Issue Number	1
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2011-11-23
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	axisymmetric heterogeneous flow plasma torch with an inter-electrode insert (IEI) refractory material spraying unit of annular injection of particles Analytical Chemistry Materials Science Operating Procedures, Materials Treatment Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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