Mesh sensitivity of RANS simulations on film cooling flow
نویسندگان
چکیده
Accurate prediction of film cooling flow is a necessity in the design high-pressure turbine components given temperature hot gas exceeds melting point component material; temperatures that are necessary to achieve high thermal efficiency. Nowadays, Computational Fluid Dynamics (CFD) methods becoming increasingly popular predict flows. When compared large eddy simulation (LES) and direct numerical (DNS), Reynolds Averaged Navier-Stokes (RANS) method most frequently employed due its much lower computational cost, though it struggles accurately solve highly three-dimensional anisotropic However, few publications have focused on mesh sensitivity problem RANS simulations. And yet generation fundamental CFD simulations directly affects accuracy calculated solution. Two typical hole geometries, namely cylindrical fan-shaped, utilised investigate with low, medium, blowing ratios. Seven sizes ranging from super coarse fine (4000 times larger) for analysis. In general, comparisons show results close experimentally observed features averaged effectiveness, while also demonstrating convergence becomes challenging modelling, especially fan-shaped hole.
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2022
ISSN: ['1879-2189', '0017-9310']
DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2021.121825