A Methodology for Soot Prediction Including Thermal Radiation in Complex Industrial Burners

• Published in: Flow, turbulence and combustion Vol. 92; no. 4; pp. 947 - 970
• Main Authors: Lecocq, Guillaume, Poitou, Damien, Hernández, Ignacio, Duchaine, Florent, Riber, Eleonore, Cuenot, Bénédicte
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.06.2014; Springer
• Subjects: Applied sciences; Automotive Engineering; Combustion; Combustion chambers; Counterflow; Energy; Energy. Thermal use of fuels; Engineering; Engineering Fluid Dynamics; Engineering Thermodynamics; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fluid dynamics; Fluid- and Aerodynamics; Fundamental areas of phenomenology (including applications); Furnaces. Firing chambers. Burners; General. Equipment design. General computation; Heat and Mass Transfer; Helicopter engines; Large eddy simulation; Mathematical models; Physics; Soot; Turbulence simulation and modeling; Turbulent flow; Turbulent flows, convection, and heat transfer; Soot modeling; Mixed reduced-tabulated chemistry; Radiative transfer; Coupling; Turbulent combustion; Large Eddy simulation; Soot; Premixed flame; Combustion; Modeling; Large eddy simulation; Combustion chamber; Diffusion flame; Heat radiation; Vorticity; Numerical simulation; Burner; Turbulence structure
• ISSN: 1386-6184; 1573-1987
• DOI: 10.1007/s10494-014-9536-6

This paper proposes a method for modeling soot when performing Large Eddy Simulation of complex geometries. To obtain a good trade-off between CPU cost and accuracy, soot chemistry is included via a tabulated flamelet approach, combined to a turbulent combustion model for Large Eddy Simulation based on a simplified description of chemistry. A semi-empirical soot model is chosen and validated on laminar premixed and counterflow diffusion flames. A proposed procedure enables to calculate radiation with a Discrete Ordinates Method approach and optimized spectral models. The developed soot model is applied to a real configuration, being the combustion chamber of a helicopter engine. To evaluate the importance of radiative heat losses, two cases are studied, using either adiabatic conditions or accounting for radiative heat gains/loss.