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One-dimensional diffusional model of heterogeneous (gas-film) detonation

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The detonation process in a tube filled with a gaseous oxidant (oxygen) and which has a “thick” layer of fuel (carbon with a low vapor pressure) deposited over its entire perimeter is examined; the weight ratio of fuel to oxidant considerably exceeds the stoichiometric ratio. It is assumed that the rate of heat release is determined by the diffusional (noninstantaneous) process of mixing of the vaporizing fuel and the oxidant. An estimate is made of the effect on the detonation parameters of heterogeneity in the composition over the cross section of the tube and of friction and heat losses. Dependences of the detonation parameters (propagation velocity, pressure profile in the front, distance to the Chapman—Jouquet plane) on the thermophysical properties of the fuel and oxidant are obtained.

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Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoe Fiziki, No. 3, pp. 86–95, May–June, 1974.

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Lesnyak, S.A., Slutskii, V.G. One-dimensional diffusional model of heterogeneous (gas-film) detonation. J Appl Mech Tech Phys 15, 355–362 (1974). https://doi.org/10.1007/BF00852225

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