A mathematical model of confined combustion of a gas hydrate has been presented that assumes full evaporation of water on the "hydrate–gas" boundary. In accordance with this assumption, the processes of diffusion of the gas through a liquid layer and the formation of a foam structure are excluded from the theoretical model, which leads to its significant simplification. The influence of the transfer coefficient on the temperature and concentration fields of the components of the gas mixture, and also their action on the intensity of decomposition of the gas hydrate have been analyzed based on numerical calculations. It has been established that both the intensity of combustion of methane and the intensity of decomposition of the gas hydrate grow with increase in the values of transfer coefficients. Here, the speed of decomposition of the gas hydrate decreases with time. It has been shown that in the case of confined combustion a burnout regime is likely to occur, with the hydrate decomposition occurring due to the heat stored in the gas mixture.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 95, No. 3, pp. 605–613, May–June, 2022.
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Gimaltdinov, I.K., Bayanov, I.M., Stolpovskii, M.V. et al. On the Confined Combustion of a Hydrate. J Eng Phys Thermophy 95, 591–598 (2022). https://doi.org/10.1007/s10891-022-02515-w
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DOI: https://doi.org/10.1007/s10891-022-02515-w