ASMTurbC method of autonomous statistical modeling of diffusion turbulent combustion and the results of its testing

Abstract


A new principle of constructing mathematical models for the processes of diffusion turbulent combustion is formulated and a method of autonomous statistical modeling of hydrodynamic characteristics of such processes (ASMTurbC method) is proposed. Consideration of the intermittence effects of dynamic and scalar fields combined with the known method of «reduced concentration of fuel» is the distinctive feature of the method. The fundamental distinction of the ASMTurbC method is the possibility of constructing mathematical models for calculating statistical characteristics (one-point ordinary and central moments) of dynamic and scalar fields of the flow only of turbulent fluid of the turbulent flow. The models constructed by the ASMTurbC method make it possible to find the conditional statistical characteristics of the inhomogeneous field of reduced fuel concentration (with the fuel used as a passive admixture) and, as a result, to obtain concentrations of the major chemical reagents of fuel and oxidizer. The method is tested using the construction of a mathematical model of a turbulent flame of a submerged axisymmetric fuel jet (propane). The results of testing are presented in the form of calculations of the main statistical characteristics of dynamic and scalar fields of the flame. It is shown that the results of calculations are in good agreement with the known experimental data and that the calculations are not time-consuming.


About the authors

Yu. V. Nuzhnov

Institute of Combustion Problems, Almaty City

Author for correspondence.
Email: nuzhnov@mail.ru

Russian Federation

Doctor of Science (Physics and Mathematics)

Professor of the Department of Mechanics

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