Abstract
Turbulent swirling flows and methane-air swirling diffusion combustion are studied by large-eddy simulation (LES) using a Smagorinsky-Lilly subgrid scale turbulence model and a second-order moment (SOM) SGS combustion model, and also by RANS modeling using the Reynolds Stress equation model with the IPCM+wall and IPCM pressure-strain models and SOM combustion model. The LES statistical results for swirling flows give good agreement with the experimental results, indicating that the adopted subgrid-scale turbulence model is suitable for swirling flows. The LES instantaneous results show the complex vortex shedding pattern in swirling flows. The initially formed large vortex structures soon break up in swirling flows. The LES statistical results of combustion modeling are near the experimental results and are as good as the RANS-SOM modeling results. The LES results show that the size and range of large vortex structures in swirling combustion are different from those of isothermal swirling flows, and the chemical reaction is intensified by the large-eddy vortex structures.
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Pan, Y.K., Tanaka, T., Tsuji, Y.: Large-eddy simulation of particle-laden rotating channel flow. In: Proceedings of ASME FEDSM'00, Boston, CD-ROM, 2000
Liu, Y., Guo, Y.C., Zhang, H.Q., et al.: LES of methane-air plane jet diffusion flame. J. Eng. Thermophys. 24(2), 343–346 (2003) (in Chinese)
Park, N., Kobayashi, T., Taniguchi, N.: Application of flame-wrinkling LES combustion models to a turbulent premixed combustion around bluff body. In: Proc. 3rd Inter. Symp. on Turbulence, Heat and Mass Transfer, Aichi Shuppan Press, 2000 pp. 847–854
Chakravarthy, V.K., Menon, S.: Large eddy simulations of bluff body stabilized flames. In: Proc. 3rd ASME/JSME Joint Fluids Engineering Conference, CD-ROM, San Fransisco, CA, 1999
Kim, W.W., Menon, S., Mongia, H.C.: Large-Eddy Simulation of a Gas Turbine Combustor Flow. Combust. Sci. Tech. 143(25), 25–60 (1999)
Roback, R., Johnson, B.V.: Mass and momentum turbulent transport experiments with confined swirling coaxial jets. Interim report NASA-CR-168252, 1983
Zhou, L.X., Chen, X.L., Zhang, J.: Studies on the effect of swirl on NO formation in methane-air turbulent combustion. In: Proceedings of the Combustion Institute, Part 2, 29 (2003) pp. 2235–2242
Zhou, L.X.: Theory and Numerical Modeling of Turbulent Gas-Particle Flows and Combustion, Science Press, Beijing and CRC Press, Florida, 1993
Zhou, L.X., Qiao, L., Zhang, J.: A unified second-order moment turbulence-chemistry model for simulating turbulent combustion and NOx formation. Fuel 81, 1703–1709 (2002)
FLUENT 6.0 User's Manual, FLUENT Inc. 2001
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The project supported by the Special Funds for Major State Basic Research (G-1999-0222-07). The English text was polished by Keren Wang.
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Hu, L., Zhou, L. & Zhang, J. Large-eddy structures of turbulent swirling flows and methane-air swirling diffusion combustion. ACTA MECH SINICA 21, 419–424 (2005). https://doi.org/10.1007/s10409-005-0065-3
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DOI: https://doi.org/10.1007/s10409-005-0065-3