2014 1(14)

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   Short abstract

 

Pages:

139 - 145

Language:

RU

Ref.:

9


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2014_1(14)_23.pdf

 

 

NUMERICAL STUDY OF CELLULAR STRUCTURE OF DETONATION OF A METHANE-OXYGEN MIXTURE

Trotsyuk A.V., Vasiliev A.A.

Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia


Citation:

Trotsyuk, A.V. and Vasiliev, A.A., (2014) Numerical study of cellular structure of detonation of a methane-oxygen mixture, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(14), PP. 139 - 145.


Keywords:

cell; detonation; multifront structure; numerical simulation; model of chemical kinetics; methane-oxygen mixture


Abstracts:

The work is devoted to numerical investigation of the multi-front (cellular) structure of two-dimensional detonation wave in a stoichiometric methane-oxygen mixture at normal initial condition. For this purpose the model of methane detonation combustion has been developed in the frame of two-stage mechanism of the detonation kinetics (an induction stage and a main heat-release stage). A numerical simulation of two-dimensional structure of detonation waves in methane oxygen mixture in a wide range of transverse size of the channel has been done. The changes in the structure of the established self-sustaining detonation wave with variation of the channel width have been studied. Based on the analysis of the obtained flowfields, the detonation cell width for stoichiometric methane-oxygen mixture is defined as equals to 0.3−0.35 cm. This value is in excellent agreement with known experimental data. The proposed model of the detonation combustion kinetics of methane-air and methane-oxygen mixtures is highly accurate and consistent with the second law of thermodynamics. The advantage of this model is its simplicity and ease of its integration in the multi-dimensional gas-dynamic numerical codes.


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