Abstract
This study has been conducted to verify the feasibility of OpenFOAM, one of the open source CFD codes, as a numerical simulation tool for the gas turbine fluid analysis. The turbomachinery specified solver is included in a community-driven version called foam-extend, and among them steadyUniversalMRFFoam was used. Although this solver is composed for the turbomachinery fluid analysis, some main variables of it are missed out in the code resulting in discontinuity of enthalpy and temperature at the interface between the stationary and rotating domains. Thus, it was corrected for the rothalpy jump to be applied properly. For the calculating machine, KISTI supercomputer Nurion was used, which enabled the parallel calculation in a node. The one stage of uncooled turbine with the mesh made by TurboGrid was used for the analysis. kOmegSST was used for the turbulence model, smoothSolver for the linear system solver, and upwind and linearUpwind for the convective discretization scheme. The calculation results by steadyUniversalMRFFoam showed good agreement with those by Ansys CFX in estimation for the mass flow rate, while it overestimated the temperature at the walls leaving the future work for this problem.
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