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Pressure rise generated by the expansion of a local gas volume in a closed vessel

Douglas Stamps, Edward Cooper, III, Ryan Egbert, Steve Heerdink and Valerie Stringer
Proceedings: Mathematical, Physical and Engineering Sciences
Vol. 465, No. 2112 (8 December 2009), pp. 3627-3646
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/25661406
Page Count: 20
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Pressure rise generated by the expansion of a local gas volume in a closed vessel
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Abstract

Experiments were conducted to determine the pressure rise that results from either the combustion of a localized gas volume or the expansion of a pressurized gas volume adjacent to an inert gas in a closed vessel. The experiments consisted of either pressurized air or the combustion of stoichiometric and fuel-lean hydrogen—air mixtures compressing an inert gas. The pressure rise in the inert gas was measured as a function of either the volume fraction or the initial pressure of the expanding gas. Helium, nitrogen, air and carbon dioxide were tested to explore the effect of inert gas heat capacity on the pressure rise. The final pressure of the inert gas increased with the volume fraction and initial pressure of the expanding gas, and was influenced to a lesser extent by the heat capacity of the inert gas. A model was assessed using the experimental data, and the theoretical results were consistent with the observed trends. This model and other published models were assessed and compared using prior data for localized gas combustion surrounded by an inert gas and the partial combustion of homogeneous methane—air mixtures.

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