Spatial-temporal diagnostics of the system of a plasma stream interacting with a surface of heat resistant material

Spectral diagnostics of plasma in the zone of its destructive interaction with heat-resistant materials

“…We illustrate the change in the temperature of the plasma jet dT/dz taking into account the processes of recombination heating. In view of the smallness of the exponent and assuming without a specific error that ξ ≈ 1, from (12) we have…”

“…Processes of heat and mass transfer in the interaction zone of a high-temperature subsonic plasma flow with the surface of a subliming heat-resistant material determine the rate of its destruction [1][2][3][4][5][6]. The wide use of nitrogen plasma jets in the study of new heat-shielding high-temperature composite materials [4][5][6][7][8][9] increases the need for the development of means and methods for diagnostics of spatially inhomogeneous plasma media with a continuously changing composition due to the destruction of the material [3,4,6,[10][11][12][13]. The aim of the research is to create a system for complex diag nostics of non-stationary spatially inhomogeneous plasma and to experimentally establish spatial-temporal variations in plasma parameters and composition in the zone of destructive interaction of a high-enthalpy nitrogen plasma jet with a sample of a carbon-containing material.…”

“…The aim of the research is to create a system for complex diag nostics of non-stationary spatially inhomogeneous plasma and to experimentally establish spatial-temporal variations in plasma parameters and composition in the zone of destructive interaction of a high-enthalpy nitrogen plasma jet with a sample of a carbon-containing material. The complex used in the work [10][11][12][13] allows to obtain and study the plasma of various gases (Ar, He, N 2 , air) and their mixtures over a wide temperature range (T = 10-30 kK), mass flow rates of 0.2-5 g s −1 , and plasma velocities of 50-1000 m s −1 in the outlet section of plasmatrons.…”