2015 1(16)

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   Short abstract

 

Pages:

178 - 183

Language:

RU

Ref.:

10


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2015_1(16)_34.pdf

 

 

NUMERICAL MODELING OF TWO-DIMENSIONAL STRUCTURE OF A RICH METHANE-AIR MIXTURE DETONATION

Trotsyuk A.V., Vasiliev A.A.

Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia


Citation:

Trotsyuk, A.V. and Vasiliev, A.A., (2015) Numerical modeling of two-dimensional structure of a rich methane-air mixture detonation, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 178 - 183.


Keywords:

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


Abstracts:

The work is devoted to numerical investigation of the multi-front (cellular) structure of two-dimensional detonation wave in a rich methane-air mixture at normal initial condition. For this purpose the proposed by us two-stage (an induction stage and a main heat-release stage) model of the detonation kinetics for methane-based mixtures has been improved. A numerical simulation of two-dimensional structure of detonation waves in rich (equivalence ratio φ=1,5) methane-air 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 the studied mixture is defined as equals to 45÷50 cm. The results of numerical simulations show that the proposed model of the detonation combustion kinetics for methane-based 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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