A review on studies of a SOM combustion model for single-and-two-phase combustion

• Published in: International journal of heat and mass transfer Vol. 96; pp. 154 - 163
• Main Authors: Zhou, L.X., Wang, F., Hu, L.Y., Li, K., Luo, K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-05-2016
• Subjects: Closures; Combustion; Gas turbine engines; Gas turbines; Large-eddy simulation; Mathematical analysis; Mathematical models; Portable document format; Reynolds averaged simulation; Second-order moment model; Turbulent combustion; Reynolds averaged simulation; Second-order moment model; Turbulent combustion; Large-eddy simulation
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2016.01.019

The comparison of SOM combustion model with other models (a-single-phase combustion; b-two-phase combustion). [Display omitted]
•The proposed (SOM) combustion model is a reasonable and economical model for simulating engineering complex combustion systems.•Validation by experimental results shows that the SOM combustion model can give good RANS and LES statistical results of both non-premixed and premixed combustion, single-phase and two-phase turbulent combustion.•The SOM model is well validated by DNS database.
To develop reasonable and economical turbulent combustion models is of vital importance in the simulation of single-phase and two-phase combustion in practical gas-turbine and rocket engine combustors, internal combustion engines, and industrial furnaces. Up to now, simple models, like EBU, EDM/EDC, presumed PDF-fast chemistry models, are widely used in commercial software, but frequently give unreasonable results not agreed with experiments. More advanced models, such as the G-equation model, BML model, laminar flame-let model, and conditional moment closure (CMC) model are good only for certain flame types (premixed or non-premixed) and flame structures (wrinkle flame and other flames). Presently, the PDF equation model is a more general one, but its small-scale mixing closure has some uncertainty and it requires large computational cost, in particular when using in LES. Accounting for this situation, the present author proposed a second-order moment (SOM) combustion model. Its closure is very simple. This model was used in RANS modeling and LES of both single-phase and two-phase turbulent combustion for non-premixed and premixed flames, like jet flame, swirling flame and bluff-body flame and spray flame, and is validated by experiments and DNS database of isothermal reacting flows and combusting flows. The results indicate that the SOM model is a more general one and is much better than the eddy-beak-up (EBU) and presumed PDF models, and its results are near to those obtained using the PDF equation model, but can save much more computation time than other complex models. The DNS validation shows that the closure method made in the SOM model is theoretically justified. In this paper a review of the development, application and validation of the SOM model is reported.