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Detonation interaction with a diffuse interface and subsequent chemical reaction

Lieberman, D. H. and Shepherd, J. E. (2007) Detonation interaction with a diffuse interface and subsequent chemical reaction. Shock Waves, 16 (6). pp. 421-429. ISSN 0938-1287. doi:10.1007/s00193-007-0080-3.

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We have investigated the interaction of a detonation with an interface separating a combustible from an oxidizing mixture. The ethylene-oxygen combustible mixture had a fuel-rich composition to promote secondary combustion with the oxidizer in the turbulent mixing zone that resulted from the interaction. Diffuse interfaces were created by the formation of a gravity current using a sliding valve that initially separated the test gas and combustible mixture. Opening the valve allowed a gravity current to develop before the detonation was initiated. By varying the delay between opening the valve and initiating the detonation it was possible to achieve a wide range of interface conditions. The interface orientation and thickness with respect to the detonation wave have a profound effect on the outcome of the interaction. Diffuse interfaces result in curved detonation waves with a transmitted shock and following turbulent mixing zone. The impulse was measured to quantify the degree of secondary combustion, which accounted for 1–5% of the total impulse. A model was developed that estimated the volume expansion of a fluid element due to combustion in the turbulent mixing zone and predicted the resulting impulse increment.

Item Type:Article
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Shepherd, J. E.0000-0003-3181-9310
Additional Information:© 2007 Springer-Verlag. Received: 31 October 2006; Revised: 20 February 2007; Accepted: 6 March 2007; Published online: 27 April 2007. Funding for this project was provided by Sandia National Laboratories.
Funding AgencyGrant Number
Sandia National LaboratoriesUNSPECIFIED
Subject Keywords:Detonation; Diffuse interface; Secondary combustion
Issue or Number:6
Classification Code:PACS: 47.40.Rs; 47.40.Nm; 47.27.wj
Record Number:CaltechAUTHORS:20200825-131359550
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Official Citation:Lieberman, D.H., Shepherd, J.E. Detonation interaction with a diffuse interface and subsequent chemical reaction. Shock Waves 16, 421–429 (2007).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105105
Deposited By: Tony Diaz
Deposited On:25 Aug 2020 20:38
Last Modified:16 Nov 2021 18:39

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