Emission of Shock-Heated Air in the Vacuum Ultraviolet Spectral Region

N. G. Bykova; Быкова Н. Г.; I. E. Zabelinskii; Забелинский И. Е.; P. V. Kozlov; Козлов П. В.; G. Ya. Gerasimov; Герасимов Г. Я.; V. Yu. Levashov; Левашов В. Ю.

doi:10.31857/S0207401X23100047

Emission of Shock-Heated Air in the Vacuum Ultraviolet Spectral Region

Authors: Bykova N.G.¹, Zabelinskii I.E.¹, Kozlov P.V.¹, Gerasimov G.Y.¹, Levashov V.Y.¹
Affiliations:
1. Institute of Mechanics, Moscow State University, Moscow, Russia
Issue: Vol 42, No 10 (2023)
Pages: 34-41
Section: Combustion, explosion and shock waves
URL: https://rjmseer.com/0207-401X/article/view/674817
DOI: https://doi.org/10.31857/S0207401X23100047
EDN: https://elibrary.ru/ROLBUM
ID: 674817

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Abstract

The results of measuring the integral and temporal spectral characteristics of shock-heated air are presented. The experiments are carried out on a modified two-sections SST-M shock tube of the Institute of Mechanics, Moscow State University in shock wave velocities ranging from 7.8 to 10.7 km/s and initial pressures in the low-pressure chamber of 0.125 and 0.25 Torr. The radiation wavelength range 115–195 nm, corresponding to the vacuum ultraviolet (VUV) spectral region, in which the main contribution to the radiation is made by the atomic lines of nitrogen and oxygen, is studied. The obtained radiation spectrograms are analyzed. The measurement data are compared with the available experimental data of other authors.

Keywords

shock waves, radiation, air, shock tube, vacuum ultraviolet, atomic emission lines

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