Continuous Multifront Detonation of a Fuel-Water Emulsion with Hot Air in an Annular Combustor 503 mm in Diameter
F. A. Bykovskii, S. A. Zhdan, E. F. Vedernikov
Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: continuous multifront detonation, fuel-water emulsions, kerosene, hot air, transverse detonation waves, annular combustor
Abstract
Regimes of continuous multifront detonation of a fuel-water emulsion (kerosene TS-1 - water) mixed with hot air preheated by a firing method in the settling chamber from 600 to 1200 K in a flow-type annular combustor 503 mm in diameter are obtained and studied. Regimes with one and two pairs of colliding waves are observed in the range of specific flow rates of air through the slot 600-1400 kg/(s·m2) for the equivalence ratio varied from 0.53 to 1.0. The frequency of rotation of transverse detonation waves is 1.0 ± 0.1 kHz for one pair of detonation waves and 2.4 ± 0.2 kHz for two pairs of detonation waves. For air temperatures up to 800 K, the limits of regimes of continuous multifront detonation are determined in terms of the mass fraction of water in kerosene: 0.38-0.53. It is shown that an increase in the water content in the fuel-water emulsion reduces the degree of dissociation of detonation products. At high air temperatures (1200 К), the specific impulse increases and approaches 2150 s if the impulse of cold species (with no combustion) is taken into account.
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