Production and study of megawatt air-nitrogen plasmatron with divergent channel of an output electrode

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Isakaev, E.H.^1 ; Chinnov, V.F.^1 ; Tyuftyaev, A.S.^1 ; Gadzhiev, M.Kh.^1 ; Sargsyan, M.A.^1 ; Konovalov, P.V.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Air plasmas;    Combustion zones;    Cylindrical channel;    Divergent channel;    Plasmatrons;    Preliminary analysis;    Swirl flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012166/pdf
DOI  :  10.1088/1742-6596/653/1/012166

来源: IOP

【 摘 要 】

Megawatt generator of high-enthalpy air plasma jet (H ≥ 30 kJ/g) is constructed. Plasmatron belongs to the class of plasma torches with thermionic cathode, tangential swirl flow and divergent channel of an output electrode-anode. Plasma torch ensures the formation of the slightly divergent (2α = 12°) air plasma jet with the diameter D = 50 mm. The current-voltage characteristics of the plasma torch has virtually unchanged voltage relative to its current with enhanced (compared with arcs in cylindrical channels) stable combustion zone. Preliminary analysis of the obtained air plasma spectra shows that at a current of 1500 A near-axis zone of the plasma jet is characterized by a temperature of up to 15000 K, and the peripheral radiating area has a temperature of 8000-9000 K.