Traveling circumferential unstable wave of cylindrical flame front

All-Russian conference on Nonlinear Waves: Theory and New Applications

Trilis, A.V.^1 ; Vasiliev, A.A.^1,2 ; Sukhinin, S.V.^1,2

Lavrentiev Institute of Hydrodynamics SB RAS, Novosibirsk

630090, Russia^1

Novosibirsk State University, Novosibirsk

630090, Russia^2

关键词: Analytical method;    Annular combustion chambers;    Chemical equilibriums;    Circular channels;    Combustible mixture;    Combustion products;    Phenomenological modeling;    Small disturbances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/722/1/012039/pdf
DOI  :  10.1088/1742-6596/722/1/012039

来源: IOP

【 摘 要 】

The researches of stability of cylindrical front of deflagration combustion in an annular combustion chamber were made using phenomenological model. The flame front is described as discontinuity of gasdynamic parameters. It is considered that the combustion products are under chemical equilibrium. The combustible mixture and the combustion products are ideal gases. The velocity of deflagration combustion is determined using the Chapman-Jouget theory. It depends on the temperature of combustible mixture only. It is found that the combustible flame front is unstable for several types of small disturbances in the system Mechanics of instabilities are examined using both the numeric and analytical methods. The cases of evolution of the unstable waves rotating in circular channel are presented.