Temporal characteristics of shock-heated air radiation

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Resumo

The paper presents the results of measuring the time spectrograms of shock-heated air radiation obtained on the STS-M and DDST-M shock tubes of the Institute of Mechanics (Moscow State University) using an integral method that records the time evolution of radiation passing through the measuring section of the shock tubes in narrow spectral ranges specially selected using monochromators. The measurements were performed for atomic lines and molecular bands in the wavelength range from vacuum ultraviolet to infrared radiation at an initial pressure before the shock wave of 0.25 Torr and shock wave velocities from 7.8 to 11.0 km/s. The obtained results are compared with the experimental data of other authors.

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Sobre autores

N. Bykova

Lomonosov Moscow State University

Autor responsável pela correspondência
Email: vyl69@mail.ru

Institute of Mechanics

Rússia, Moscow

P. Kozlov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

Rússia, Moscow

I. Zabelinsky

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

Rússia, Moscow

G. Gerasimov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

Rússia, Moscow

V. Levashov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

Rússia, Moscow

Bibliografia

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2. Fig. 1. Panoramic spectrum of air radiation at shock wave velocity VSW = 10 km/s and initial pressure p0 = 0.25 Torr.

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3. Fig. 2. Time dependence of the radiation power of nitrogen atoms at wavelength l = 149 nm in shock-heated air at p0 = 0.25 Torr and shock wave velocities VSW = 10.4 (1), 10.0 (2), and 8.8 (3) km/s.

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4. Fig. 3. Time dependence of the radiation power of NO molecules at wavelength l = 213 nm in shock-heated air at p0 = 0.25 Torr and shock wave velocities VSW = 10.9 (1), 10.6 (2), 10.0 (3), and 9.1 (4) km/s.

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5. Fig. 4. Time dependence of the radiation power of N2 molecules at a wavelength of l = 313 nm (1) and N2+ molecular ions at a wavelength of l = 391 nm (2) in shock-heated air at p0 = 0.25 Torr and a shock wave velocity of VSW = 9.62 km/s.

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6. Fig. 5. Time dependence of the radiation power of nitrogen atoms at a wavelength of l = 818 nm in shock-heated air at p0 = 0.25 Torr and shock wave velocities of VSW = 10.8 (1), 10.1 (2), and 9.1 (3) km/s.

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7. Fig. 6. Time dependence of the radiation power of nitrogen atoms at a wavelength of l = 822 nm in shock-heated air at p0 = 0.25 Torr and shock wave velocities VSW = 10.0 (1), 9.3 (2) and 8.7 (3) km/s.

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8. Fig. 7. Time dependence of the radiation power of N2+(1–) at a wavelength of l = 391 nm, measured in the shock tubes DDST-M at VSW = 10.0 km/s and p0 = 0.25 Torr (1) and EAST at VSW = 9.9 km/s and p0 = 0.3 Torr (2).

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