Numerical Simulation for Counterflow Convection-Film Cooling ofGas Turbine Combustor Liner with Ribbed Wall

doi:10.12068/j.issn.1005-3026.2018.10.007

Abstract

Abstract: To study the cooling structure of gas turbine with counterflow convection-film for combustor liner， a fluid-solid coupling mathematical model of the cooling heat transfer of the combustor liner was established. Considering the propagation of Reynolds stress， the robustness of the k-ω model was used to capture the flow of viscous underlying layer in the near wall. The k-ε model was used in the mainstream areas to avoid the k-ω model being too sensitive to inlet turbulence parameters. The SST k-ω model was a turbulence model which was more suitable for this study by using a mixture function combined with the k-ω and the k-ε models. The results provided not only the distribution of flow and temperature fields in the computational domain fluid， but also the temperature distribution of the ribbed walls of the combustor liner. Moreover， these simulation results well agreed with the experimental ones.

Key words: gas turbine, ribbed wall, film cooling, fluid /solid coupling, numerical simulation

CLC Number:

TK472

LI Bao-kuan， ZHANG Wen-bo， WANG Xi-chun. Numerical Simulation for Counterflow Convection-Film Cooling ofGas Turbine Combustor Liner with Ribbed Wall[J]. Journal of Northeastern University Natural Science, 2018, 39(10): 1402-1407.

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