Study of the absorption characteristics of molecular oxygen in the Schumann-Runge system at high temperatures: II. Experiment and comparison with calculation

Bykova, N. G.; Забелинский, И. Е.; Ibraguimova, L. B.; Shatalov, O. P.

doi:10.1134/s0030400x08110052

Cited by 11 publications

(2 citation statements)

References 7 publications

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“…The experimental setup and the method of oxygen absorption cross-section measurement in ultraviolet range of spectrum were described in detail in [3]. The typical oxygen absorption oscillogram is shown in Fig.…”

Section: Determination Of the Vibrational Oxygen Temperaturementioning

confidence: 99%

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Experimental study and numerical modeling of vibrational oxygen temperature profiles behind a strong shock wave front

Забелинский

Ibraguimova

Shatalov

et al. 2012

Progress in Flight Physics

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The evolution of oxygen molecule vibrational temperature behind the front of a shock wave was studied at shock wave velocities 3 4.5 km/s and gas pressure ahead of the shock front 1 5 Torr. The results of vibrational temperature measurement con¦rmed the conception of separation of vibrational relaxation and dissociation zones behind the shock wave front at T ≤ 6500 K. It is observed that at T = 6500 10 500 K the vibrational temperature decreased in comparison with its value characterized by the achievement of vibrational translational equilibrium before the dissociation started. It is shown that the model should to be modi¦ed to describe the evolution of the oxygen vibrational temperature under the conditions of vibrational relaxation and dissociation coupling.

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Section: Determination Of the Vibrational Oxygen Temperaturementioning

confidence: 99%

“…In this connection, the cross sections calculated for thermally equilibrium conditions in a gas using the ¤Spectrum¥ software [2] were ¦rst tested by comparing with the cross sections measured also in equilibrium conditions [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental study and numerical modeling of vibrational oxygen temperature profiles behind a strong shock wave front

Забелинский

Ibraguimova

Shatalov

et al. 2012

Progress in Flight Physics

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Broad-linewidth laser absorption measurements of oxygen between 211 and 235nm at high temperatures

Hong

Lam

Davidson

et al. 2011

Journal of Quantitative Spectroscopy and Radiative Transfer

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Investigation of oxygen dissociation and vibrational relaxation at temperatures 4000–10 800 K

Ibraguimova

Sergievskaya

Levashov

et al. 2013

The Journal of Chemical Physics

143

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The oxygen absorbance was studied at wavelengths 200–270 nm in Schumann-Runge system behind the front of a strong shock wave. Using these data, the vibrational temperature Tv behind the front of shock waves was measured at temperatures 4000–10 800 K in undiluted oxygen. Determination of Tv was based on the measurements of time histories of absorbance for two wavelengths behind the shock front and on the results of detail calculations of oxygen absorption spectrum. Solving the system of standard quasi-one-dimensional gas dynamics equations and using the measured vibrational temperature, the time evolution of oxygen concentration and other gas parameters in each experiment were calculated. Based on these data, the oxygen dissociation rate constants were obtained for thermal equilibrium and thermal non-equilibrium conditions. Furthermore, the oxygen vibrational relaxation time was also determined at high temperatures. Using the experimental data, various theoretical and empirical models of high-temperature dissociation were tested, including the empirical model proposed in the present work.

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Study of the absorption characteristics of molecular oxygen in the Schumann-Runge system at high temperatures: II. Experiment and comparison with calculation

Cited by 11 publications

References 7 publications

Experimental study and numerical modeling of vibrational oxygen temperature profiles behind a strong shock wave front

Experimental study and numerical modeling of vibrational oxygen temperature profiles behind a strong shock wave front

Broad-linewidth laser absorption measurements of oxygen between 211 and 235nm at high temperatures

Investigation of oxygen dissociation and vibrational relaxation at temperatures 4000–10 800 K

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