Temperatures in Imploding Detonation Waves

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Abstract
The spectroscopic and electron temperatures in spherically-imploding detonations in a stoichiometric propane-oxygen mixture were measured and the gas temperature behind the shock waves at cylindrical and spherical implosion fronts was estimated from the probability of triple shock formation. Both the spectroscopic and electron temperatures increase with the propagation of detonation as rapidly as the pressure. The temperature behind the shock waves is in agreement with the theoretical value. The results suggest that the high-pressure peak appears not behind the shock waves but in the combustion zone of the detonation. The reason for this is attributed to reactions caused by shock waves reflected at the vessel wall releasing more heat than in normal combustion, by other exothermic processes such as recombination.

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