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Detonation and Transition to Detonation in Partially Water-Filled Pipes

Bitter, Neal P. and Shepherd, Joseph E. (2013) Detonation and Transition to Detonation in Partially Water-Filled Pipes. Journal of Pressure Vessel Technology, 135 (3). Art. No. 031203. ISSN 0094-9930. doi:10.1115/1.4023429.

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Detonations and deflagration-to-detonation transition (DDT) are experimentally studied in horizontal pipes which are partially filled with water. The gas layer above the water is stoichiometric hydrogen–oxygen at 1 bar. The detonation wave produces oblique shock waves in the water, which focus at the bottom of the pipe due to the curvature of the walls. This results in peak pressures at the bottom of the pipe that are 4–6 times greater than the peak detonation pressure. Such pressure amplification is measured for water depths of 0.25, 0.5, 0.75, 0.87, and 0.92 pipe diameters. Focusing of the oblique shock waves is studied further by measuring the circumferential variation of pressure when the water depth is 0.5 pipe diameters, and reasonable agreement with theoretical modeling is found. Despite the local pressure amplification due to shock focusing, peak hoop strains decreased with increasing water depth. Failure of the detonation wave was not observed, even for water depths as high as 0.92 pipe diameters. Likewise, transition to detonation occurred for every water height.

Item Type:Article
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Shepherd, Joseph E.0000-0003-3181-9310
Additional Information:© 2013 by ASME. Contributed by the Pressure Vessel and Piping Division of ASME for publication in the Journal of Mechanical Design. Manuscript received July 31, 2012; final manuscript received December 18, 2012; published online May 21, 2013. Assoc. Editor: Spyros A. Karamanos.
Issue or Number:3
Record Number:CaltechAUTHORS:20131118-155105966
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Official Citation:Bitter NP, Shepherd JE. Detonation and Transition to Detonation in Partially Water-Filled Pipes. J. Pressure Vessel Technol.. 2013;135(3):031203-031203-10. doi:10.1115/1.4023429
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42541
Deposited By: Tony Diaz
Deposited On:19 Nov 2013 00:13
Last Modified:10 Nov 2021 16:24

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