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An experiment to measure the recombination rate of oxygen

Published online by Cambridge University Press:  28 March 2006

J. Wilson
J. Wilson
Affiliation:
Graduate School of Aeronautical Engineering, Cornell University, Ithaca, New York Now at Royal Aircraft Establishment, Farnborough, Hampshire, England.
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Abstract

The feasibility of an experiment to measure the recombination rate of oxygen is examined using the ideal-dissociating-gas model. The experiment is to be performed in a shock tube, the shock-heated (and dissociated) gas being cooled by passing it through a Prandtl-Meyer expansion, and then allowed to recombine in a constant-area channel. At appropriate densities and shock Mach numbers it is found that recombination takes place in a distance suitable for a laboratory experiment.

Using this technique, the recombination rate of oxygen has been measured at 2700 ˚K. To determine the recombination rate, the absorption of ultraviolet light at a wavelength of 2283 å measured 11 cm downstream of the expansion was compared with absorptions calculated for various values of the recombination rate constant.

The measured value of the recombination rate constant of oxygen is in agreement with values calculated from dissociation rate measurements.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 15 , Issue 4 , April 1963 , pp. 497 - 512
Copyright
© 1963 Cambridge University Press

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