NDLI: Detonation interaction with a diffuse interface and subsequent chemical reaction

Content Provider	Springer Nature Link
Author	Lieberman, D. H. Shepherd, J. E.
Copyright Year	2007
Abstract	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.
Ending Page	429
Page Count	9
Starting Page	421
File Format	PDF
ISSN	09381287
e-ISSN	14322153
Journal	Shock Waves
Issue Number	6
Volume Number	16
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-04-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diffuse interface Thermodynamics Mechanics, Fluids, Thermodynamics Fluids Detonation combustion Solid State Physics and Spectroscopy Condensed Matter Acoustics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

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