Further Development of Eddy Dissipation Model for Turbulent Non-Premixed Combustion Simulation

Xingyou Li, Yongliang Chen and Peiyong Wang ()
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Xingyou Li: Department of Propulsion Engineering, Xiamen University, Xiamen 361005, China
Yongliang Chen: Department of Propulsion Engineering, Xiamen University, Xiamen 361005, China
Peiyong Wang: Department of Propulsion Engineering, Xiamen University, Xiamen 361005, China

Energies, 2023, vol. 16, issue 13, 1-15

Abstract: In view of the application limits of the modified eddy dissipation model (MEDM) in simulations of weakly turbulent flow, compressible flow, and internal flow, an improved eddy dissipation model (IEDM) is proposed. The IEDM model uses the dissociation reactions to obtain the correct combustion temperature instead of the specific heat compensation used in the MEDM model. This extends the application in compressible flow simulation. The simulation accuracy of the IEDM model for weakly turbulent flow is improved by using the accurate transport property and model. The maximum ε / k is limited to give a reasonable reaction rate near walls, and the expression for the model parameter A is also updated. Nine turbulent flames including seven jet flames and two opposed jet flames are simulated with the improved model. Compared with the experimental data of the jet flames, the peak temperature differences with the MEDM model and the IEDM model are 189 and 161 K, respectively, indicating the minor accuracy improvement of the IEDM model. Compared with the experimental data of the opposed flames, the peak temperature differences with the MEDM model and the IEDM model are 131 and 7 K, respectively, indicating the significant accuracy improvement of the IEDM model.

Keywords: eddy dissipation model; modified eddy dissipation model; improved eddy dissipation model; turbulent combustion model; turbulent non-premixed flame (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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