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  Cornell University

MAE Publications and Papers

Sibley School of Mechanical and Aerospace Engineering

New article: Numerical Simulation of Turbulent Combustion: Scientific Challenges

Article:  Ren ZY, Lu Z, Hou LY, Lu LY; (2014)  Numerical Simulation of Turbulent Combustion:  Scientific Challenges, Science China-Physics Mechanics & Astronomy, 57(8):1495-1503


Abstract:  Predictive simulation of engine combustion is key to understanding the underlying complicated physicochemical processes, improving engine performance, and reducing pollutant emissions. Critical issues as turbulence modeling, turbulence-chemistry interaction, and accommodation of detailed chemical kinetics in complex flows remain challenging and essential for high-fidelity combustion simulation. This paper reviews the current status of the state-of-the-art large eddy simulation (LES)/probability density function (PDF)/detailed chemistry approach that can address the three challenging modelling issues. PDF as a subgrid model for LES is formulated and the hybrid mesh-particle method for LES/PDF simulations is described. Then the development need in micro-mixing models for the PDF simulations of turbulent premixed combustion is identified Finally the different acceleration methods for detailed chemistry are reviewed and a combined strategy is proposed for further development.

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