

NUMERICAL MODELING OF TWODIMENSIONAL STRUCTURE OF A RICH METHANEAIR 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 twodimensional structure of a rich methaneair mixture detonation, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 178  183.

Keywords: detonation; numerical simulation; model of chemical kinetics; methaneair mixture; cell; multifront structure 
Abstracts:
The work is devoted to numerical investigation of the multifront (cellular) structure of twodimensional detonation wave in a rich methaneair mixture at normal initial condition. For this purpose the proposed by us twostage (an induction stage and a main heatrelease stage) model of the detonation kinetics for methanebased mixtures has been improved. A numerical simulation of twodimensional structure of detonation waves in rich (equivalence ratio φ=1,5) methaneair mixture in a wide range of transverse size of the channel has been done. The changes in the structure of the established selfsustaining 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 methanebased 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 multidimensional gasdynamic numerical codes. 
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