Argon Plasma Radiation Features at the Initial Stage behind a Shock Wave Front

• Published in: Russian journal of physical chemistry. B Vol. 15; no. 1; pp. 56 - 62
• Main Authors: Levashov, V. Yu, Kozlov, P. V., Bykova, N. G., Zabelinskii, I. E.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2021; Springer Nature B.V
• Subjects: Argon plasma; Catalysis; Chemistry; Chemistry and Materials Science; Emission analysis; Heat flux; Kinetics and Mechanism of Chemical Reactions; Physical Chemistry; Plasma radiation; Radiant flux density; Shock waves; Wave fronts; argon plasma; population of emitting states; shock-heated gases; radiation; emission spectroscopy
• ISSN: 1990-7931; 1990-7923
• DOI: 10.1134/S1990793121010097

The study of radiation shock-heated gases provides information on the radiation heat fluxes, which are of great interest for problems in hypersonic aerodynamics. The results of the experimental study of the initial stage of nonequilibrium emission of pure argon obtained at the experimental “Shock tube” complex of the Research Institute of Mechanics, Moscow State University are presented. A simplified model is proposed for the calculation of the radiation intensity of atomic lines behind the shock wave front. The effect of electrons on the features of argon radiation at the initial stage after the passage of the shock wave behind the gas-dynamic front before the beginning of the avalanche ionization is discussed.