Brozhko R. Improving the efficiency of plasma torches for spraying and surfacing

Object of study - physical processes in electronic arc, stabilized by the gas flow in the discharge channel of plasma torches for spraying and fusing; purpose of the research - development of principles of enhancing the effectiveness of plasma torches for spraying and fusing by changing the structural, electrical and gas-dynamic parameters; research methods - analytical and numerical methods for solving problems of mathematical physics, computer simulation methods, experimental methods of investigation by using modern registration and measurement equipment; practical results - the complex of fundamental and applied research aimed at developing new and increasing service life of existing constructions of plasma torches; novelty - mathematical model of the arc plasma interactions with the powder material was further developed, heated in plazma jet, which takes into account the mutual influence of the processed material in the distribution of temperature and velocity in plazma jet, refined relationship of the diameter of the inlet section of the discharge channel of the plasma torch determination according to the diameter of thermochemical cathode in various ranges of values of the arc jet was offered, an analytical dependence relative to the calculation of electrical, thermal, erosion characteristics of plasma torches based on current modulation and other parameters of the arc of the plasma torch; the degree of implementation - the results implemented at OJSC "AIS Works" and "TMBPO" DonSTU; field of application - engineering.