Thermal degradation of two liquid fuels and detonation tests for pulse detonation engine studies |
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Authors: | X Rocourt P Gillard I Sochet D Piton A Prigent |
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Institution: | (1) Laboratoire Energétique Explosions Structures, EA 1205, Université d’Orléans, ENSI de Bourges, I.U.T. de Bourges, 63 Avenue de Lattre de Tassigny, 18020 Bourges cedex, France;(2) ROXEL, établissement Centre, route nationale 151, 18570 Le Subdray, France |
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Abstract: | The use of liquid fuels such as kerosene is of interest for the pulse detonation engine (PDE). Within this context, the aim
of this work, which is a preliminary study, was to show the feasibility to initiate a detonation in air with liquid-fuel pyrolysis
products, using energies and dimensions of test facility similars to those of PDEs. Therefore, two liquids fuels have been
compared, JP10, which is a synthesis fuel generally used in the field of missile applications, and decane, which is one of
the major components of standard kerosenes (F-34, Jet A1, ...). The thermal degradation of these fuels was studied with two
pyrolysis processes, a batch reactor and a flow reactor. The temperatures varied from 600°C to 1,000°C and residence times
for the batch reactor and the flow reactor were, respectively, between 10–30 s and 0.1–2 s. Subsequently, the detonability
of synthetic gaseous mixtures, which was a schematisation of the decomposition state after the pyrolysis process, has been
studied. The detonability study, regarding nitrogen dilution and equivalence ratio, was investigated in a 50 mm-diameter,
2.5 m-long detonation tube. These dimensions are compatible with applications in the aircraft industry and, more particularly,
in PDEs. Therefore, JP10 and decane were compared to choose the best candidate for liquid-fuel PDE studies.
This paper was based on work that was presented at the 20th International Colloquium on the Dynamics of Explosions and Reactive
Systems, Montreal, Canada, July 31 – August 5, 2005. |
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Keywords: | Pyrolysis Batch reactor Flow reactor Decane JP10 Pulse detonation engine (PDE) Deflagration to detonation transition (DDT) |
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