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Non-equilibrium dissociating nitrogen flow over a wedge

Kewley, D. J. and Hornung, H. G. (1974) Non-equilibrium dissociating nitrogen flow over a wedge. Journal of Fluid Mechanics, 64 (4). pp. 725-736. ISSN 0022-1120. doi:10.1017/S002211207400187X.

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Experimental results for dissociating nitrogen flow over a wedge, obtained in a free-piston shock tunnel, are described. Interferograms of the flow show clearly the curvature of the shock wave and the rise in fringe shift after the shock associated with the dissociation. It is shown that the shock curvature at the tip of the wedge can be used to calculate the initial dissociation rate and that it is a more sensitive indication of the rate than can be obtained from fringe shift measurements under the prevailing experimental conditions. Because the freestream dissociation fraction can be adjusted in the shock tunnel, the dependence on atomic nitrogen concentration of the dissociation rate can be determined by the shock curvature method. A detailed calculation of the flow field by an inverse method, starting from the measured shock shape, shows good agreement with experiments.

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Hornung, H. G.0000-0002-4903-8419
Additional Information:© 1974 Cambridge University Press. Reprinted with permission. (Received 1 June 1973 and in revised form 2 February 1974) The financial support of the facility by the Australian Research Grants Committee is gratefully acknowledged. We should also like to thank R. French and K. Smith for technical and photographic assistance.
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Australian Research CouncilUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:KEWjfm74
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5576
Deposited By: Archive Administrator
Deposited On:25 Oct 2006
Last Modified:08 Nov 2021 20:27

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