Leonid Ivanovich Charakhovski

• Doctor of Engineering
• Head of Department at National Academy of Sciences of Belarus

Organic contaminants (for example in wastewater effluents) cause serious health and environmental problems due to their high chemical oxygen demand (COD), low biodegradability, and toxicity. Non-equilibrium and thermal plasmas were actively studied and numerous reactor geometries were developed to induce chemical reactions in treated liquids. Therm...

Numerical simulation of a tandem-type plasmatron intended for supersonic plasma spraying of metallic and ceramic materials at atmospheric pressure has been carried out. The calculation results are compared with experimental data. The internal gas dynamics of the plasmatron and the interaction of a plasma stream with spray particles are presented in...

Results of experimental investigations of a new-type generator of an arc water plasma, having a high thermal efficiency close to 100%, are presented. This generator represents a system comprising a vortex arc plasma generator, in which an electric arc is stabilized by water vapor and a straight-through-flow tubular electric steam generator. Such a...

This work presents a plasma torch able to operate at supersonic regime with axial injection of feedstock. In contrast to commonly used linear scheme, the principal axis of the plasma torch is perpendicular to feedstock injection direction, which is aligned with coming out plasma jet. The plasma torch has slightly ascending current voltage character...

A formula for quick calculation of thermal characteristics of materials used for thermal protection is proposed. The mode of heating of the sample external surface (subjected to thermal exposure) is approximated by two regions, which differ by corresponding boundary conditions on the heating surface: T_f=cτ (linear growing with time) and T_f=const...

A stationary experiment was performed to study the degradation of carbon-based materials by immersion in a plasma jet. In the experiment, graphite and C/C composite were chosen as the target materials, and the reactive plasma jet was generated by an air plasma torch. For macroscopic study of the material degradation, the sample’s mass losses were m...

The results of experimental investigations of electrical and thermal characteristics of a vortex plasma torch with a reverse vortex, generated in a hollow blind-end electrode, are presented. It is shown that the reverse vortex essentially improves the performance of the plasma torch and contributes to an increase in the thermal efficiency and entha...

An experimental Plasma Wind Tunnel was developed at ITA (Technological Institute of Aeronautics). The setup allows simulating the hypersonic flight conditions at high altitudes using a plasma torch setup. This paper discus the particularity of the experimental setup and the methodology used to the Mach number measure in the plasma jet. The results...