Temporal characteristics of shock-heated air radiation

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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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作者简介

N. Bykova

Lomonosov Moscow State University

编辑信件的主要联系方式.
Email: vyl69@mail.ru

Institute of Mechanics

俄罗斯联邦, Moscow

P. Kozlov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

俄罗斯联邦, Moscow

I. Zabelinsky

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

俄罗斯联邦, Moscow

G. Gerasimov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

俄罗斯联邦, Moscow

V. Levashov

Lomonosov Moscow State University

Email: vyl69@mail.ru

Institute of Mechanics

俄罗斯联邦, Moscow

参考

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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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