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The second-order moment (SOM) combustion model proposed by the present authors is compared with eddy-break-up (EBU) and presumed probability density function (PDF) combustion models in large-eddy simulation of jet diffusion combustion, swirling diffusion combustion and premixed combustion behind a bluff body. The statistical results for time-averaged and RMS fluctuation temperatures are validated...
The three-dimensional large-eddy simulation (LES) is carried out for a piloted methane–air jet flame (Flame C), measured in Sandia National Laboratory, and its statistical results are validated by experimental data. The LES statistically-averaged time-averaged temperature, the root mean square (RMS) value of temperature, and time-averaged methane and oxygen concentration are compared with those obtained...
A unified second-order moment (USM) turbulence-chemistry model for simulating NO x formation in turbulent combustion is proposed. All the correlations, including the correlation of the reaction-rate coefficient fluctuation with the concentration fluctuation, are closed by the transport equations in the same form. This model abandons the series expansion approximation of the exponential term...
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