КЕРУВАННЯ СЕРЕДНЬОМАСОВОЮ ЕНТАЛЬПІЄЮ ПОТОКУ ПЛАЗМИ СИСТЕМИ N–O–C–H З УРАХУВАННЯМ ЕНЕРГЕТИЧНОЇ ЕФЕКТИВНОСТІ ПЛАЗМОТРОНА.

The results of experimental studies of the impact of mode parameters on power characteristics of the generator of plasma of N–O–C–H system and medium enthalpy of plasma, generated by the latter were presented. The studies were conducted in a two-electrode plasmatron with two schematic diagrams – with an automatic gas dynamic arc length stabilization and with a selfsetting arc. It is shown that all the benefi ts of using mixtures of air with a hydrocarbon gas are realized in the case of fi xing the arc length in the arc channel. The use of automatic gas dynamic arc length fi xation practically allows stabilizing the values of effi ciency throughout the whole range of changing generation mode parameters and, at the same time, eliminating the impact of effi ciency on the medium enthalpy of plasma fl ow. The transition to the system N - O (air) reduces the average level of effi ciency by 7…10 % and almost twice the value of medium enthalpy. The arsenal of means of infl uencing the mentioned parameters due to a constant composition of plasma gas reduces. The plasmotron with a self-setting arc on plasma-forming mixtures of the system N-O-C-H has by 15…20 % lower level of effi ciency values than in the case of fi xing the arc length. The medium enthalpy of plasma depends signifi cantly on the fl ow-rate and composition of plasma-forming gas. An increase in the values of medium enthalpy by an increase in the arc current leads to deterioration of power characteristics of the plasma generator. Coordination of own power characteristics of the device and parameters of plasma being generated can only be carried out only on the basis of a compromise. [ABSTRACT FROM AUTHOR]