Modeling of vibration-dissociation oxygen kinetics at temperatures of 4,000-11,000 K

The time profiles of vibrational molecular oxygen temperature T v measured earlier in experiments behind a strong shock wave were used for testing the theoretical and empirical models of thermal nonequilibrium dissociation of molecules. To do this, dissociating gas flows behind the strong shock wave...

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Bibliographic Details
Published in:Fluid dynamics 2014, Vol.49 (1), p.112-119
Main Authors: Ibraguimova, L. B., Levashov, V. Yu, Sergievskaya, A. L., Shatalov, O. P.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Classical Mechanics
Computational fluid dynamics
Empirical analysis
Engineering Fluid Dynamics
Evolution
Fluid- and Aerodynamics
Gas flow
Gas temperature
Mathematical models
Physics
Physics and Astronomy
Shock waves
Wave fronts
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Summary:The time profiles of vibrational molecular oxygen temperature T v measured earlier in experiments behind a strong shock wave were used for testing the theoretical and empirical models of thermal nonequilibrium dissociation of molecules. To do this, dissociating gas flows behind the strong shock wave front were calculated with account for these models. If the initial gas temperature behind the wave front T 0 < 6.5×10 3 K, the models well describe changing the temperature with time. However, for T 0 > 7×10 3 K neither of the models tested describes the measured temperature profiles satisfactorily. Using the empirical model proposed in the present study made it possible to satisfactorily describe the vibrational temperature evolution observed in experiments at temperatures up to 11×10 3 K.
ISSN:0015-4628
1573-8507
DOI:10.1134/S0015462814010141