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Reactant jetting in unstable detonation

Sanderson, S. R. and Austin, J. M. and Liang, Z. and Pintgen, F. and Shepherd, J. E. and Hornung, H. G. (2010) Reactant jetting in unstable detonation. Progress in Aerospace Sciences, 46 (2-3). pp. 116-131. ISSN 0376-0421. http://resolver.caltech.edu/CaltechAUTHORS:20100412-082045136

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Abstract

We note the common existence of a supersonic jet structure locally embedded within a surrounding transonic flow field in the hitherto unrelated phenomena of unstable gaseous detonation and hypervelocity blunt body shock wave interaction. Extending prior results that demonstrate the consequences of reduced endothermic reaction rate for the supersonic jet fluid in the blunt body case, we provide an explanation for observations of locally reduced OH PLIF signal in images of the keystone reaction zone structure of weakly unstable detonations. Modeling these flow features as exothermically reacting jets with similarly reduced reaction rates, we demonstrate a mechanism for jetting of bulk pockets of unreacted fluid with potentially differing kinetic pathways into the region behind the primary detonation front of strongly unstable mixtures. We examine the impact of mono-atomic and diatomic diluents on transverse structure. The results yield insight into the mechanisms of transition and characteristic features of both weakly and strongly unstable mixtures.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.paerosci.2009.11.002DOIArticle
http://www.sciencedirect.com/science/article/pii/S0376042109000463PublisherArticle
ORCID:
AuthorORCID
Shepherd, J. E.0000-0003-3181-9310
Additional Information:© 2009 Elsevier. In honor of Professor Hornung's 75th birthday. Available online 8 January 2010. The five junior authors wish to express their gratitude to Prof. Hornung for his enthusiastic guidance and friendship over a period of many years. The citations in this paper clearly articulate the powerful influence that Hans’ prior studies have exerted on the direction of the current investigation. This work could never have begun without his leadership of the GALCIT community and his support for our privileged membership of it. We happily dedicate this manuscript to the celebration of his 75th birthday.
Group:GALCIT
Record Number:CaltechAUTHORS:20100412-082045136
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20100412-082045136
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17923
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Apr 2010 16:47
Last Modified:22 Sep 2016 23:36

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